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whereas in other Trogaspidia the depressed dorsal portion is always 

 impunctate and polished, in this it is densely hirsute. We cannot 

 concède that this distinction is of generic or even subgeneric value, 

 in view of the several, equally distinct modes of modification which 

 the clypeus of various species of Trogaspidia assumes. Although the 

 margin of the hypopygium in the females placed by Bischoff in 

 Lobotilla has four lobes, in view of the absence of any other corre- 

 lated characters, we cannot consider that thèse signify anything more 

 important than a small group of related species of Trogaspidia. 



The tegulae of the only species of Spinulotilla that we hâve seen, 

 are no smaller in the maie than in some Glossotilla. The only dif- 

 férence that we can find for separating Glossotilla from Spinulotilla 

 in the maie sex is the présence of a tooth on the outer side of the man- 

 dibles in the former. There are no characters given by Bischoff for 

 separating the females and we doubt that Spinulotilla can be main- 

 tained as even a subgeneric group; but, not having spécimens of the 

 females, we prefer for the présent to recognize it as a subgenus rather 

 than to synonymize it. 



Trogaspidia and Glossotilla also cannot be maintained as distinct 

 gênera. The only basis for their séparation in the maie sex lies in the 

 shape of the scutellum, and that shows transition stages which con- 

 nect the two groups. Similar species groups occur within each of the 

 two and the species of thèse are possibly more closely related to one 

 another than to other members of their so-called genus. There seems 

 to be no real way of distinguishing the females of Glossotilla from those 

 of Trogaspidia. In Trogaspidia the carinae of the sides of the pygidial 

 area are terminated before the apex, leaving a médian, immargined 

 « lobe ». In Glossotilla thèse carinae corne nearer to the apex of the 

 segment or disappear more gradually so as not to leave a marginal 

 notch and hence a médian lobe. But this is not always the case even 

 in Glossotilla. In a spécimen of G. suavis var. speculatrix (F. Smith), 

 for example, before us and so determined by Bischoff, the carinae 

 terminate abruptly leaving a distinct médian lobe. We therefore con- 

 sider Glossotilla, as well as Spinulotilla, as of subgeneric rank. 



The maies of Smicromyrme, in the restricted sensé, differ from those 

 of Glossotilla in having a short second segment of their flagellum, but 

 in no other respect. The females only differ in having sometimes two, 



