1 64 W M. A. KEPNER. 



Subsequently two other larvae left the excavated region of the 

 nucha. These specimens were preserved in alcohol. May 14, 

 the fourth and most vigorous larva dropped from the host. 

 This larva was placed upon soil in a box where it burrowed into 

 the earth and formed an oval, dark brown pupa. This pupa 

 has not yielded an imago, so that I have been unable to cor- 

 roborate Wheeler's diagnosis as based upon the adult fly. 



Except for some details which are readily overlooked in pre- 

 served specimens, such as Packard had, the larvae I found closely 

 resemble the figures and descriptions given by Packard. With 

 the living material which I had at my service, I was able to see 



| 



details which make these larvae correspond more closely to the 

 following description of larvae of Sarcophagidae than to that of 

 (Estrididae larvae. Brauer ('83) says that the larvae of Sarco- 

 pluigidae "are rounded, thinner anteriorly and amphipneustic. 

 The antennae are short, thick, cylindrical, divergent, wart-like 

 tubercles, each with two ocellus-like chitinous rings at the tip. 

 The mouth hooklets are distinct, strongly curved and separated 

 from each other. The abdominal segments are distinctly dif- 

 ferentiated by transverse swellings and are each provided with a 

 girdle of spines. The hind stigma-plate is situated in a deep 

 cavity, which is formed by the last segment alone. The anal 

 swelling is two-pointed. The puparium is oval. 1 " Thus I am 

 led to infer that I have the same kind of larva that Packard had 

 figured and described and am able to corroborate Wheeler's 

 statement that this is not a "bot-fly" larva but a sarcophagid 

 larva. 



Apart from this I have been interested in certain details that 

 no one has recorded for this particular sarcophagid. Figure 

 I represents the dorsal aspect of the larva magnified ten diameters. 

 Each segment is seen to bear a band of spines. The antennae 

 are seen from the ventral side (Fig. 6, ant.} together with the 

 strongly curved, (list i net mandibles (Fig. 6). On the ventral 

 side of the posterior segment there is a trilobed disc armed with 

 stout spines (Fig. 3 and Fig. 5, d). This may function as a 

 sucking disc. The posterior rn<l of the last segment is divided 



1 This translation of Brauer's description was taken from Williston's "N'oitli 

 American Diptera," 3d ed., page 349, by Dr. J. M. Aldrich. 



