301 



Antenna one and a half times as long as head and thorax together. 

 Mesonotum with a few brown hairs on anterior and lateral margins ; 

 scutellar hairs setulose, sparse. Hypopyginm much as in hcumatopotiis. 

 Legs slender, the surface hairs sparse and short. Wings narrow, the 

 surface with distinct though minute hairs. 



Female. — Similar to the male except that the wing markings are 

 more sharply defined and the clear spots much smaller, with a tendency 

 to have the small spot at apex of first posterior cell indistinct or ab- 

 • sent, and the resemblance to guttipennis in wing-markings more pro- 

 nounced though the white spot near base of anterior branch of media 

 is always absent. 



Length, 1-1.25 mm. 



Illinois locality, L^rbana, 111., June 6-19, 1914. T?ken on window 

 in Natural History Building, University of Illinois (J. R. Malloch). 



Originally described by Coquillett from the District of Columbia, 

 I have before me a female specimen taken at light at South Haven, 

 Mich., July 15, 1914, by Mr. Hart. 



6. CuLicoiDEs SANGuisuGus Coquillett 



Ceratopogon sangnisuga Coquillett, Proc. U. S. Nat. Mus., 1901, Vol. 23, p. 604. 



The early stages of this species are unknown to the writer, but one 

 is reasonably safe in assuming the larva to be acjuatic in habit. 



Male. — Blackish brown, subopaque. Head black, antennae yellow- 

 ish on basal half of flagellum, the plumes yellow. Anterior lateral 

 angles of mesonotum pale brown; disc with grayish pruinescence, a 

 small black spot near to anterior margin and lateral angle, a narrow 

 indistinct central stripe which is almost connected with two elongate 

 spots at middle, and two elongate submedian spots which do not ex- 

 tend to either anterior or posterior margins ; scutellum black. Abdo- 

 men blackish brown. Legs varying from brown to yellow, without 

 defined pale or dark markings. Wings as in female (PI. XXII, 



Fig-3)- 



Eyes contiguous ; antenna one and a half times as long as head and 

 thorax combined, apical four joints as in Figure 4, Plate XX. Meso- 

 notum rather weakly and sparsely haired. Hypopygium as in Figure 

 18. Legs slender, the surfaces with moderately long hairs; basal joint 

 of hind tarsus as long as the next two joints combined; fourth and 

 fifth subequal; claws swollen at base, equal, half as long as fifth joint. 



Female. — Differs from the male in being rather smaller and more 

 robust ; in having antennae about one fourth longer than the head and 

 thorax combined, the first eight joints of flagellum subequal in length, 

 shape as in Figure 9, Plate XX, the last five gradually increasing in 



