PACKARD.] 



PARASITES OF THE LOCUST. 



661 



end is divided into two portions, of which the upper forms a slope, on the lower edge 

 of which aro situated six jicuto tubercles, of which the three lower are the larger. In 

 the center of the slope are two small, i)roniinent spiracles, or breathing-holes. Below 

 this slope is a transverse ridge, from which arise tiireo sharp tubercles situated above 

 the large anal tubercle or foot. Length about a third (0.30) of au inch. 



I adopt Professor Riley's identification of this maggot. 



Our tigure is not drawn from specimens taken in this country, but 

 copied from Curtis's Farm Insects. It is sufiicieutly accurate, however, 

 to represent our form. 



Professor Kiley says that this maggot "is quite common, and has 

 been found in Minnesota, Iowa, Kebraska, various parts of Kansas, 

 Missouri, and even Texas. It has destroyed, in many instances, as many 

 as 10 per cent, of them." These small maggots are found in the locust- 

 egg pods, either singly or in varying numbers, there sometimes being a 

 dozen packed together in the same pod. They exhaust the juices of the 

 eggs and leave nothing but the dry and discolored shells, and when 

 they are not numerous enough to destroy all the eggs in the pod, their 

 work, in breaking open a few, often cauises all the others to rot. 



"When fed to repletion, this maggot contracts to a little cylindrical 

 yellowish-brown pupa [case], about half the length of the outstretched 

 and full-grown larva, and rounded at both ends. From this pupa [-case] 

 in the course of a week in warm weather, and longer as the weather is 

 colder, there issues a small grayish, two-winged lly, about one-fifth of 

 an inch long, the wings expanding about one-third of an inch, and in 

 general appearance resembling a diminutive house-fly. 



The common Ji/'sli-fiji{Sarcophaga carnaria^ Plate LXIV, Figs. 1-3). — The 

 maggot (Plate LXtV, Fig. 1) of this fly also feeds on the eggs, but prob- 

 ably on those which are addled. It is larger than the Anthomyia mag- 

 got, with no spines around the end of the body ; and the pupa-case 

 (Plate LXIV, Fig. 2, enlarged) is much larger, truncate at the end, and 

 tapering toward the head end. I have received two specimens, half- 

 grown, of the maggots of this species, taken from the abdomen of a locust 

 {C. spretus) on the Vermejo River, New Mexico, June 29, by Lieut. W. 

 L. Carpenter, U. S. A. 



The tico-Uned Telephorus gruh. — I have also received from Mr. Whit- 

 man, of Saint Paul, Minn., a specimen of the larva of Telephorus bilinea- 

 tus, said by him to be destructive to the locust. I add a description 

 copied from m}^ first report as State entomologist of Massachusetts. 



Fig. 2. — Head of larva of hvo-Uned Telephorus, enlarged. 



^ a, top view of head and prothoracic segment ; at, antenna; ; md, mandibles; h, under 

 side showing mp the maxillary palpi ; Ijp, labial i)alpi ; /, lirst i>air of feet. 



The beetles of this and other species which belong to the family of 

 fire-flies feed on the leaves of forest deciduous trees, especially the birch. 



