365 



abdominal pairs minute, posterior pair large, circular, situated on ven- 

 tral surface of the upper pair of apical processes. Body bare except 

 for the usual 6 thoracic hairs. 



Pupa (PI. LI I, Fig. 7). — Head without spines; antennae stout 

 basally, slender apically, directed downward and slightly outward ; 

 thoracic respiratory organs sessile. Wings and legs short, extending 

 to apex of first segment. Abdomen with spinose armature which be- 

 comes stronger apically; apical segment with stout processes which 

 are not thorn-like. 



Imago. — Distinguished from other genera by the following 

 characters: third antennal joint conical or subcorneal, with a slender 

 terminal arista; discal cell of wings present; 5 posterior cells; anal 

 cell closed ; hind tibia with 1 spur. 



HABITS OF LARVAE AND IMAGINES 



See under family. 



Keys to Species 

 larvae 



1. Large species, 15 mm., or more, in length; neither the upper nor 



lower anal protuberances with well-defined lateral process (PI. 

 LII, Fig. 11) ornata, 



— Smaller species, about 10 mm. in length ; either the upper or lower 



anal protuberances, or both, with well-defined lateral process .... 2 



2. Only the lower anal protuberances with well-defined lateral process 



(PI. LII, Fig. 12) quadrata. 



— Both upper and lower protuberances with well-defined lateral proc- 



esses (PI. LII, Fig. 9) sp. ? 



PUPAE 



1. Large species, 16 mm., or more, in length ; apical abdominal segment 

 with 8 thorns (PI. LII, Fig. 13) ornata, 



— Smaller species, about 10 mm. in length; apical abdominal segment 



with 8 strong thorns and several smaller ones (PI. LII, Fig. 14) 

 quadrata, 



Chrysopila ornata Say 



Leptis ornata Say, Jour. Acad. Nat. Sri. Phila., Vol. 3, 1S2.'?, p. 34. 



Larva (PI. LII, Fig. 6). — Length, 15-20 mm. White. Anterior 

 spiracles brown, posterior pair black. 



