214 



THE CANADIAN ENTOMOLOGIST 



India, 1897), is that of a male Thrinchostoma, allowing for en- 

 graver's errors. - But, unfortunately, Bingham's accompanj ing 

 description, which is of the female, is meager. In the colouring of 

 the clypeus and legs and the structure of the base of the propodeum 

 it agrees with T. sladeni, but in the colouring of the wing ner- 

 vures with T. assamensis. » 



[Assamensis appears to be near to T. macrognathum (Friese) 

 from Java, which (cf) has "Clypeus gelbbraun jederseits an Rande 

 mit schwarzer Beule." Head and thorax yellow-haired. "Beine 

 gelblich, gelbbraun behaart." Long 9-10 mm.; 9 not known. 



Friese redescribes your Khasia Hills insect as sladeni, using 

 same 9 and cf forms as I had. (Tijdschrift voor Entomologie, 



LVII (1914), p. 27.) Friese 

 makes a subgenus (of Halictus) 

 Rostratilapis for macrognathum 

 and sladeni. — T. D. A. C] 



Thrinchostoma assamensis, 



n. sp. 



cT. — Length 13 mm. (head 

 extended), expanse 21 mm. 

 Head and thorax black, clothed 

 with short pale fulvous hair; 

 inner margins of the eyes con- 

 cave; clypeus greatly extended, 

 more so than in T. sladeni, clear 

 yellow ; supra-clypeal area 

 piceous; malar space piceous, 

 its extremity yellow; mandibles 

 yellow, their tips piceous ; labrum 

 yellow; clypeus very shining, 

 coarsely and remotely punctured ; 

 supra-clypeal space more closely 

 and finely punctured; antenna? 

 piceous; apex of scape paler; 

 upper part of front finely and 

 shallowly punctured, almost 

 impunctate in the region of the ocelli; propodeum rounded 



Fig. 25. — (See p. 215.) 



