( cix ) 



one point is inside the other. The incision is sometimes very 

 slight, in other cases it reaches nearly to the base of the claw. 



There are numerous cases in which the claws are pectinate, 

 that is to say, toothed like a comb. 



The claws of Cantharidsa require special mention. These 

 insects appear to have four claws. Tliis is due to the fact 

 that each claw roughly resembles the blades of two knives 

 placed side by side and fastened together by their bases, the 

 outer blade being more slender than the inner one, and often 

 very flexible. In some genera these two blades seem to be 

 inseparable, but in others, such as Cerocoma, they have a 

 slight separate movement. It is not my purpose now to 

 discuss what this outer blade is, but it is, I think, generally 

 admitted that it is not part of the claw. It may, however, 

 in conjunction with the real claw serve the purpose (if there 

 be any) of a deeply bifid claw. In some genera the inner, or 

 real claw is simple, in others it is pectinate. 



Insects with toothed clatvs. 



As examples of toothed claws I would mention among the 

 Coleoptera, Melolontha and numerous others in the same 

 family and Corynodes among the Eumo^nd^. 



In the Hymenoptera certain species of Fompilus, Salius, 

 and Megachile. 



In the Neuroptera, Cordulegaster a-nd many other Dragon-flies. 



Sometimes the tooth instead of being acute is truncate at 

 the apex and has its sides somewhat parallel. This occurs in 

 the Melolonthid genus Seharis and among the Hymenoptera 

 in the genera Fompilus and Nomada. 



Insects with appendicidate claws. 

 Appendiculate claws ai^e not very uncommon in the 

 Coleoptera. • Good examples are Bytuvus among the Clavi- 

 corns, and Oocamenta and its allies among the Melolonthidai. 

 In a more elongate form it is seen in Lohonyx and Henicopus 

 among the Malacoderms. Among the butterflies Lycaena has 

 it in almost identically the same form as in Byturus. 



Insects with bifid, claws. 

 Claws which are bifid at the apex are perhaps more common 



