ORDER HYMENOPTEliA. 



L65 



the brightest, and in Bombus and Apathus they are much 



more variable in color than the females; in several spi 



of Kylocopa, while the females are black, the males are 



bright yellow. (Descent of .Man. i. 354.) 



The group Terebrantia includes those families in which 



the ovipositor is normal, being adapted for boring, or so 



modified as to form a saw-like apparatus; while the Aculeata, 



including the ants, wasps, and bees, have a true sting.* 



Family Tenthredinidae. — A.bdomen sessile, Dot narrowed at the 

 . ovipositor saw -like; anterior tibiae with two apical spurs; the 



Via. 807. The lar,-l> saw-fly, natural size and enlarged, witl ' 



different ages, natural sixe. Mis> L.Sullivan 



head is short and transversely oblong, with short, i 



usually simple, sometimes clavate or pectinate ant< i i The larva' 



*In preparing the Bvnopses of the characters i t the families, the 

 author has often copied nearly verbatim from Cr< 

 the Hymenoptera of America, north of Mexi 188T>. li 



is not improbable that some <•! the " families" are merely sub-fami- 

 lies, as for example in the ants and was 



