330 



The species is represented in the collection here by imagines from 

 the following Illinois localities : Lake County, Algonquin, Waterman, 

 Milan, Bloomington, Normal, Pekin, Forest City, Havana, Cham- 

 paign, Urbana, Meredosia, Camp Point, Belleville, Dubois, Grand Tow- 

 er, Alto Pass, and Metropolis, the dates of collection ranging from 

 July 12 to August 31. The species is a very common one and probably 

 occurs throughout the entire state. There is also in the collection one 

 specimen from New Harmony, Ind., taken September 2, and one from 

 Delaware Co., Pa. I have taken the species at White Heath, 111., on 

 two species of Monarda and on Hclianthits in August. 



The pupa which I have associated with this species bears a strik- 

 ing similarit}^ to that figured by Riley for Sy stare Juts or ens, differing 

 however in the dark color of the wing cases and in their being com- 

 paratively shorter, not extending to the apex of the second abdominal 

 segment, whereas in Systcceluis oreus they extend to apex of third. 

 There is also an evident distinction in the structure of the dorsum of 

 the apical segment. 



ExoPROsoPA FASCiPENNis Say 



Anthrax fascipennis Say, Keating 's Narrative of an Expedition to the Source of 

 St. Peter's Eiver, etc., Appendix, p. 373. 1824. 



Pii/^a (PI. LXXXI, Fig. 4). — Length, 16 mm. Pale testaceous, 

 slightly shining, thorns on head black-brown. Upper pair of cephalic 

 thorns directed forward and very slightly downward, widely separated 

 at base, parallel ; below the level of these thorns on each side, on a 

 raised base, are two stout thorns, the inner one long and directed almost 

 straight forward, the outer much shorter, slightly curved, and directed 

 outward ; on each side of median line of lower margin of front is a 

 stout thorn, the bases of the thorns connected (PI. LXXXI, Fig. 5) ; in 

 addition to the thorns there are 6 long slender hairs on the head capsule, 

 as shown in the figure, visible from in front, and one on each side close 

 to the suture between head and thorax, located near base of the sheath 

 containing mouth parts. Thorax with a pair of closely placed hairs on 

 disc on each side of median line, and a pair more widely placed, above 

 base of wing; wing sheath with a sharp tubercle about one third from 

 base, near costal margin. First abdominal segment with a transverse 

 series of 5 or 6 short, thick thorns occupying the central portion of an- 

 terior margin, and 6 long curved hairs on each side of these in con- 

 tinuation of the transverse series which extends over midway from 

 median line to spiracle ; posterior to spiracle are about 7 long hairs ; 

 segments 2 to 7 with a regular transverse median series of flattened 

 thorns, as shown in Figures i and 2, Plate LXXXI ; on segments 2 and 



