igi3.] S. A. ROHWER : Hymenoptera, III . 241 



Tomostethus assamensis, sp. nov. 



This species is related to T formosanus, Enslin, but does not 

 agree in all points with Enslin's description of this species and 

 may be separated from it by having the tibiae almost entirely 

 white. 



Male. — Length 4 mm. Anterior margin of the clypeus trun- 

 cate, sides oblique, with the angles sharp ; supraclypeal area flat ; 

 supraclypeal foveae confluent with the antennal foveae, more 

 sharply delined, punctiform ; middle fovea large, deep, rectangular 

 in outline ; frontal foveae punctiform, deep, opposite the dorsal 

 margin of the middle fovea ; antennal furrows poorly defined ; 

 ©cellar basin large, pentagonal in outline, defined by rounded 

 walls, not v-d above the anterior ocellus ; postocellar furrow 

 present, angulate anteriorly ; postocellar area defined laterally by 

 elongate foveae, convex, about twice as wide as long ; postocellar 

 line distinctly shorter than the ocellocular line ; posterior orbits 

 narrow, without a carina ; eyes strongly converging to the cly- 

 peus ; antennae short, flagellum hairy ; scape and pedicel sub- 

 equal in length, the pedicel slightly longer than its apical width ; 

 third antennal joint a little shorter than the fourth and fifth ; claws 

 with a simple erect inner tooth ; hind wings with one discal cell ; 

 stigma angulate at base, tapering to a subtruncate apex ; trans- 

 verse radius in apical third of cell ; hypopygidium broadly rounded. 

 Black, shining; apices of femora, tibiae except a small spot on 

 the dorsal apices, the first joint of the tarsi, white ; remaining 

 joints of the tarsi brown; wings strongly dusky; venation black. 



Sadiya, North-East Assam. Described from one male col- 

 lected November 23rd, 191 1. 



Type in the Indian Museum. 



Subfamily SELANDRIINAE. 



Genus Stromboceros, Konow. 



Stromboceros (NeostrombocerOs) congener, Konow. 



Three specimens forwarded from the Indian Museum and col- 

 lected on the Abor Expedition come from the following localities : 

 Dibrugarh, North-East Assam (female, collected November 17th- 

 19th, 19 11). Kobo, altitude 400 feet (female, collected December 

 3rd, T911). Sadiya, North-East Assam (male, collected November 

 27th, 1911). 



Stromboceros (Neostromboceros) congener, 

 variety tarsalis, nov. 



This variety differs from the typical form in having the tibiae 

 (except the extreme apices, which are brown) yellow, and in 

 having the tarsi 'yellowish brown. 



