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Spilomena bobyjosei Girish Kumar & Amal sp. nov., a new species of aphid wasp in the genus Spilomena Shuckard, 1838, is described from the Southern Western Ghats of Kerala, India. This genus is rarely collected from the Indian subcontinent, and most species are described from a single specimen. The genus can be distinguished from closely related genera in having occipital carina absent, hind wing media not diverging before Cu-a, fore wing with marginal cell elongate (longer than stigma), one recurrent vein and two discoidal cells present, stigma large and pronotal collar with complete transverse carina. To date, ten species have been described from India. This paper adds an eleventh species. The differential diagnosis with its nearest species is provided. Additionally, a key to the Indian species of Spilomena is provided.

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The genus Spilomena Shuckard, 1838, is reviewed from the Indian subcontinent. One new species, Spilomena keralaensis Rajan, Sureshan & Girish Kumar sp. nov. is described from the Southern Western Ghats of Kerala and differences from similar species are given.

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A new species of tiphiid wasp, namely, Tiphia kashmirensis Hanima & Girish Kumar sp. nov. is described from Kashmir, India. Male of Tiphia khasiana is described for the first time. Key to species of Tiphia from the Indian subcontinent of Allen (1975) is modified here to accommodate the new species and male of T. khasiana.

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The genus Sphex Linnaeus (Hymenoptera: Sphecidae) is studied from India and key to Indian species is provided. The state-wise distributions of four species of Sphex are augmented here. A new synonymy is proposed: Sphex zubaidiyacus Augul, 2013 = S. obscurus (Fabricius, 1804).

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The crabronid wasp, Solierella turneri Dutt, 1917 (Hymenoptera: Crabronidae) is newly recorded from various regions of India and female is described. Hitherto, the S. turneri Dutt has been only reported from northern India (Pusa of Bihar), the current record extends its range to southern India (Kerala, Tamil Nadu and Karnataka).

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The Sri Lankan species, Methocha ubiquita Krombein, 1982 is newly reported for the fauna of India. Differential characters, figures, distribution map and comparisons of the newly recorded species with original description of type material are provided.

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A new species of the genus Ceratina Latreille, 1802 is described from Tawang, Arunachal Pradesh, Eastern Himalaya, India. The new species is assigned to the subgenus Ceratinidia Cockerell & Porter, 1899 which was previously represented by seven species from mainland India. Ceratina (Ceratinidia) bryanti Cockerell, 1919 is also reported for the first time from India. Diagnostic features are elaborated and illustrated and distinguishing characters are discussed from closely allied species Ceratina (Ceratinidia) bryanti Cockerell, 1919. Type localities mapped and augmented. An updated checklist of Ceratina species and their distribution in India is mapped and discussed.

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Species of the genus Chalybion Dahlbom, 1843 from India are studied. The species C. gracile Hensen, 1988 is recorded for the first time from India. The reported distributions of C. bengalense Dahlbom, 1845 within various states of India are augmented here. A modified key to the species of Chalybion from India is provided. Diagnosis, figures, and table showing comparison of newly recorded species, i.e., C. gracile with the widely distributed C. bengalense is provided. Diagnostic morphological characters of both C. gracile and C. bengalense are illustrated here.

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Range extension of the square-headed wasp, Vechtia rugosa (F. Smith, 1858), which is primarily the Southeast Asian species, towards India is presented. A key to species and subspecies of the genus Vechtia Pate, 1944 is also provided with illustrations of V. rugosa rugosa (F. Smith, 1858). The known distribution of the Vechtia species in Southeastern Asia is also discussed.

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The genus Piyumoides Leclercq, 1963 (Hymenoptera, Crabronidae) is a rarely reported genus of crabronid wasp, till now not much is known about the genus. In the present study, we are reporting for the first time the distribution of Piyumoides Leclercq, 1963 from the Indian subcontinent with the description of a new species Piyumoides indicus Amal & Girish Kumar sp. nov. from the Western Ghats. The newly described species closely allies with the Malaysian species P. hewitti (Cameron, 1908) by having a propodeal enclosure without bordering carinae, without distinct basal striae, and having a vestigial pygidial plate. A key to the species of the genus Piyumoides is also provided with illustrations of the new species.

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Andreimyrme substriolata (Chen, 1957) and Odontomutilla fletcheri Lelej, Terine & Girish Kumar, 2020 (Hymenoptera, Mutillidae) are newly reported from India. O. fletcheri was only recorded from Sri Lanka till now & A. substriolata was only known from various Southeast Asian countries (China, Taiwan, Indonesia, Japan, Laos, Malaysia, Thailand and Vietnam), in the present study these species are discovered from India which pronounce the geographical affinities of India with Sri Lanka and Southeast Asian countries and vice versa. Diagnosis, figures, distribution maps and remarks of these species are provided.

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A new species of tiphiid wasp, namely, Tiphia (Tiphia) andhraensis Hanima & Girish Kumar sp. nov. is described from Andhra Pradesh in the southern coastal region of India based on the female holotype. The new species is described, illustrated and compared with congeneric species. The diagnostic character of the new species is the presence of a strong, median longitudinal carina on posterior side of propodeum. The new species described here was collected from the Mudasarlova reservoir area of the Visakhapatnam district of Andhra Pradesh. The previous key to the species of Tiphia from the Indian subcontinent is modified to accommodate the new species. This new species is the first tiphiid wasp described from Andhra Pradesh.