42 ZOOLOGY 



d%. Wings as in d\ ; proboscis usually 

 weak ; abdomen rounded at apex ; 

 antennae pectinate . . . Bombycidce 



(Silk-worms) 



d s . Wings rest horizontally ; proboscis 



weak Geometridce 



(Measuring-worms) 



61. Hind wing with three dorsal veins [Microlepi- 



doptera, small-winged moths]. 

 Ci. Wings not divided or parted. 



d\. Wings rest in gable fashion, with 



short fringe or none at all. 

 e\. Anterior wings elongate-tri- 

 angular ; palps extending be- 

 yond head .... Pyralidce 



(Pyralids) 



62. Anterior wings much elongated, 

 cambered ; antennae with thick 

 basal segment ; palps slightly 

 protruding .... TortricidjR 



(Leaf-rollers) 



di. Wings at rest, flat or enveloping the 

 body ; the anterior wings with 

 long fringe ; strongly developed 

 palps Tineidce 



(Leaf-miners) 



c 2 . Wings divided or parted .... Pterophoridce 



(Plume-moths) 



KEY TO THE PRINCIPAL FAMILIES OF HYMEXOPTERA 



a\. Trochanter simple ; female with sting. 



61. First segment of the hind leg more or less 

 compressed, at least on inner side, and 



often thickly hirsute Apidce 



(Bees) 



62- First segment of hind leg more or less cylin- 

 drical, neither markedly broadened nor 

 hairy. 



