307 



joint of hind tarsi about three times as long as second ; claws short, 

 simple, equal. Wings broader than in male, venation similar but with 

 the first vein extending nearer to middle of third (PI. XXII, Fig. 8). 



Length, 2-2.75 mm. 



Illinois localities : Havana — larva; and pupa? found on log in river 

 and on submerged portions of wooden float, and adults taken at Chau- 

 tauqua Park, April 29, 1914; St Joseph, May 10, 1914; Monticello, 

 June 28, 1914; Urbana, June 20, 1888, and June 6, 1914. 



Originally described from specimens obtained in the District of 

 Columbia, New Jersey, and on Mount Washington, N. H. Carman 

 has recorded the occurrence of the larvae in Kentucky'" under circum- 

 stances similar to its occurrence in Illinois. 



Nothing is known of the habits of the adults. The few specimens 

 in the collection here were obtained by sweeping vegetation near 

 streams. 



2. Ceratopogon LEVIS Coquillett 



Ceratopogon levis Coquillett, Proe. U. S. Nat. Mus., Vol. 23, 1901, p. 604. 



This species varies very considerably in color. In some specimens 

 the pale yellow is confined to the anterior lateral angles and scutellum, 

 while in others it occupies a very large portion of the disc laterally and 

 posteriorly. In the case of one specimen from Michigan the yellow 

 extends across the mesonotum in front of scutellum, and anterior to 

 this transverse line there are two detached, rounded submedian spots 

 of yellow. In the great majority of specimens the abdomen is dark 

 brown on the dorsum and yellowish ventrally, but in the paler forms 

 the dark color is confined to the basal half of the dorsal segments. The 

 thorax is always much more distinctly shining than in fusciilus, and 

 the length is invariably less. Second and apical joints of antennal 

 flagellum of male as in Figures 14 and 15, Plate XXI. The third vein 

 ends beyond two thirds the wing-length, and the firsi vein reaches to 

 one third the length of third; the usual cross vein connects the first 

 vein with third ; the media forks slightly beyond the cross vein. Hy- 

 popygium as in Figure 19; last ventral segment with a single trans- 

 verse row of hairs, four of which are in the area which is occupied 

 by the group of hairs in fiiscuhis. 



Length, 1-1.5 mm. 



Illinois localities : Havana, Muncie, White Heath. L^rbana, Monti- 

 cello, Mahomet, St. Joseph, Manchester, Dubois, Golconda, Cairo. 

 Dates of occurrence range from April 18 to November 24. 



Originally described by Coquillett from specimens obtained at 

 Marlboro, Md. I have seen specimens from Itliaca, N. Y. (O. A. 



*Bull. 159, Ky. Agr. Exper. Sta., 1912, p. 31, sp. 5. 



