384 



much broader than long, whereas the segments in vertcbratns are 

 longer than broad (PI. LIV, Fig. 9). The head also differs from that 

 of the latter, as is shown in Figures 5 and 13, Plate LIV. 



The pupae of the two species are very much alike in general 

 structure, but may be separated as indicated in key. I have dealt with 

 this stage of the three species known to me in a recently published 

 paper*. 



Larvae and pupae of this species were submitted by Dr. E. P. 

 Felt from New York State, and others in our collection are from 

 northern Illinois. All the specimens were obtained where white-grubs 

 were common, on which the larvae were observed feeding. They un- 

 doubtedly do much good in reducing the numbers of these grubs, thus 

 more than offsetting the damage done by the imagines in destroying 

 hive-bees. 



Deromyia Philippi 



I have the larva of one species of this genus and the pupae of two. 

 The larva closely resembles that of ProinacJius fitcliii in general ap- 

 pearance, but differs noticeably in the structure of the head, as shown 

 in Figures 11 and 5, Plate LIV. The maxillary palpi are shorter 

 than in Asiliis notatus, and the apical segment is less distinctly 

 carinated on its upper posterior margin. The armature of the thorax 

 and the apical segment is similar to that of Asilus and Promachus. 



The pupae differ from those of other asilids known to me in the 

 characters given in key. 



Deromyia discoIvOR Loew 



Diogmites discolor Loew, Berl. Ent. Zeitschr., 1866, p. 21. 



Larz'a. — Length, 25-30 mm. White, head and spiracles blackish 

 brown. 



Head normal in size, the exposed portion as in Figure 11, Plate 

 LIV. Segments not as long as broad, those of abdomen with distinct 

 elevations on their anterior third which are in the form of rather pro- 

 nounced pseudopods. Prothoracic and anal spiracles large, the lateral 

 metathoracic and abdominal pairs very small. Apical segment not 

 sharply carinated, much longer than the segment which bears the 

 spiracles. 



Pupa (PI. LIV^, Fig. 7). — Length, 25 mm. Brown, slightly shin- 

 ing. 



*A Comparison of the Pupae of Promochus vertehratus and P. fitchii. Bull. 

 Brooklyn Ent. Soc, Vol. 11, pp. 66-68. (1916) 



