433 



longer than sixth ; eighth transverse apically ; hypopygiiim as in Fig- 

 ure 5, Plate XXXIII. Fore tarsus with long hairs on posterior sur- 

 face from middle of basal joint to apex of fourth ; basal joint barely 

 appreciably longer than tibia. Cubitus forking below cross vein. 



Female. — Color, and proportions of fore tibia and basal joint of 

 fore tarsus as in male. 



Length, 6.5-8 mm. 



Illinois localities: Illinois River at Havana, larvcC and pupse ; 

 Havana, East Peoria, Urbana, Normal, Algonquin, Dubois, and 

 Parker, imagines. Dates of occurrence, in April, May, and August. 



A male specimen was reared from a larva taken in Salt Fork at 

 Homer Park March 21, 19 14, by the writer. The adult emerged 

 March zy, after passing three days in the pupal stage. The figures of 

 larval and pupal details given herewith were drawn from the exuviae 

 of this specimen mounted in Canada balsam. There are slight dis- 

 crepancies between these figures and those given by Johannsen for 

 this species. 



Walker's original specimens came from St. Martin's Falls, Albany 

 River, and Hudson Bay. Johannsen records the species from Ithaca, 

 N^. Y., and from Kansas. 



C. nccmts Mitchell differs noticeably from flavicingula in having 

 the wings each with five spots, one at the cross vein, one in middle 

 of second posterior cell, one in middle of fourth posterior cell, and 

 usually two in anal cell, the one nearest to anal angle rather in- 

 distinct. This species was described from Beulah, N. M., and taken 

 at an altitude of 8000 feet. I have seen a specimen from Professor 

 Aldrich, taken at Palo Alto, Calif. 



12. Chironomus DEviNCTus Say 



Chironomus devinctus Say, Jour. Acad. Nat. Sci. Phil., Vol. 6, 1829, p. 150. 

 Chironomus compes Coquillett, Proc. Ent. Soc. Wash., Vol. 9, 1908, p. 145. 



Male. — Differs from flavicingula in having the fore tarsi without 

 long hairs, the basal joint much longer than the tibiae (1.75 : 1.25), 

 the hind tibia; without the median brown band, and the cross vein of 

 the wing clear. 



Female. — Agrees with male in color and proportions of fore 

 tibiae and basal joint of fore tarsi. 



Length, 6.5-8 mm. 



Illinois localities: Quiver Lake (Illinois River) May 8, 1896, 

 and LTrbana, May 25, 1898 (C. A. Hart); Muncie, May 24, and 

 Centerville, August 16, 19 14 (J. R. Malloch). 



