385 



Differs from the pupa of winthemi only in the characters given in 

 key to family. For full description of winthemi see paper referred 

 to in paragraph following key. 



The foregoing descriptions and comparisons were made from 

 specimens of discolor sent to me by J. A. Hyslop from Hagerstown, 

 Md. 



The larvae of both species known to me feed upon larvae of 

 Coleoptera that occur in fields and gardens. 



Proctacanthus Macquart 



I have no identified larvae of this genus before me, but have ob- 

 tained the pupae of two species — milberti Macquart, and philadclph- 

 icus Macquart — which very closely resemble each other. In my paper 

 referred to at end of key I have given a full description of the pupae 

 of milberti which it is unnecessary to reproduce here. The only differ- 

 ence between the pupae of milberti and philadelphicus that appears to 

 serve as a reliable guide to their separation is found in the form of 

 the pair of thorns above the base of the middle leg in front of the 

 wing. 



Both species occur commonly in Illinois. In the larval stage they 

 feed upon white-grubs and other coleopterous larvae in fields and 

 gardens. 



Asilus Linne 



I have before me the larva of one species of this genus and the 

 pupae of two. 



The larva differs from this stage of other genera known to me 

 in having the palpi much longer than broad, the head narrower pos- 

 teriorly, and the apical abdominal segment slightly but distinctly 

 carinated along its upper posterior margin. These characters may not 

 apply to the larvae of other species of this genus, and I do not sug- 

 gest that they are invariably applicable. 



The pupae are very much alike structurally, but may be separated 

 by the use of the characters stated in the key. 



Asilus not at us Wiedemann 



Asilus notatus Wiedemann, Aussereur.' Zweifl. Tns., Vol. 1, p. 451. (1828) 



Larva. — Length, 25-30 mm. White, head and spiracles black. 

 Head with the protruded portion conical (PI. LIV, Fig. 10) ; 

 maxillary palpi more than 3 times as long as broad; antennae distinct. 



