329 



Shelford kindly permitted me to use his material. The species is ecto- 

 parasitic. 



The species is represented in the collection here by imagines from 

 the following Illinois localities : Pekin, Oiiincy, Algonquin, Cedar 

 Lake, Clay City, Grafton, Thebes, and Mt. Carmel. There is also a 

 specimen from St. Louis, Mo. The dates of occurrence are in August 

 with the exception of the example from Mt. Carmel, which is given as 

 having been taken June lo or ii — a rather unusual date if correct. 

 Dr. Shelford gives a summary of localities for the species in his paper 

 from data obtained from dipterologists. 



ExoPROSOPA FASCIATA Macquart ? 

 Exoprosopa fasciata Maequart, Dipt. Exot., Vol. 2, Pt. 1, 1838, p. 51. 



Pupa. — Length, 20 mm. Testaceous yellow, thorns and wing 

 sheaths dark brown. Head with 8 strong thorns ; upper median pair 

 widely separated at base ; lateral view of head as in Figure 6, Plate 

 LXXXIII; lateral pair of thorns slender and elongated; 2 strong hairs 

 at base of each of the upper thorns, one above the base of each of the 

 lower median pair and slightly laterad of them, and one close to suture 

 between head and thorax, slightly above level of lower thorns. Thorax 

 with the usual 4 hairs, a widely placed pair above wing base and an- 

 other pair closely placed midway between wing base and dorso-mediati 

 line and distinctly caudad of the posterior one of the former pair; 

 wing sheath with a distinct, bifid, wartlike protuberance close to costal 

 margin near base; apices of middle leg-sheaths projecting distinctly be- 

 yond apices of wing sheaths; prothoracic spiracle with well-defined 

 rugose reniform area. Abdominal segments 2 to 6 with the bases and 

 apices of the short thorns of the transverse series turned up at right 

 angles (PI. LXXXIH, Fig. 3) ; first segment with a transverse series 

 of long curled hairs which does not extend over the median line and is 

 discontinued about two thirds of the distance to spiracle ; posterior to 

 the spiracle is a series of about 8 long hairs which are distinctly 

 shorter than those of the segment above; spiracles of moderate size, 

 margins rugose; apical segment as in Figures 4 and 11. 



The pupal exuvium from which the foregoing description was 

 drawn was found in a garden in Urbana by Miss E. Mosher, August, 

 1914. There is little doubt about the identity of the species, although 

 the imago was not directly associated with the specimen, for the large 

 size and dark-colored wings, coupled with the fact that fasciata is the 

 only common species that agrees in these respects occurring at this 

 time here, make it very probable that the identification is correct. 



