381 



1896 (W. A. Nason) ; and Urbana (imagines). Seven specimens 

 were reared from a lot of larvae found in the creek at Urbana, but 

 only pupae were preserved, the larval exuviae not being found in the 

 vial. Two of the imagines were captured in June and July; the others 

 were taken at light October 2 and 9, in a house in late October (22), 

 amongst evergreens November 2, and one, December 2, marked 

 "hibernating." The species may hibernate in the imago stage, though 

 larvae are found as early as March (Miss Mitchell). 



This species has been recorded by Johannsen from the following 

 states : New York, Massachusetts, South Dakota, Pennsylvania, and 

 Michigan, and also from the District of Columbia. I have seen speci- 

 mens, submitted by Professor Aldrich, from Moscow and Potlach, 

 Idaho, and from Palouse, Wash., the months of capture being April 

 and September. 



12. Tanypus johnsoni Coquillett 



Tanypus johnsoni, Coquillett, Proe. U. S. Nat. Mus., Vol. 23, 1901, p. 609. 



Male. — Differs from dyari in being paler in color, the thoracic vittae 

 being generally reddish and the ground color much paler. Abdominal 

 segments 2-6 with basal brown band, 7 entirely brown, 8 and the 

 hypopygium pale yellow. Legs yellow, femora with preapical brown 

 band. Wing with two poorly defined fasciae, one over the cross vein 

 and the other between that and wing-tip, the latter without dis- 

 tinguishable clear spots in it. 



The fore tarsi in this species have distinct long hairs on the 

 posterior surfaces from before apex of basal joint to apex of fourth. 

 Hypopygium almost identical with that of hirtipennis (PI. XXVIII, 

 Fig. 2) ; the hairs on abdomen unicolorous pale brown. 



Female. — Agrees in coloration with the male. 



Length, 3.5 mm. 



Illinois localities: Momence, three males taken at light, July 17, 

 1914 (C. A. Hart); Algonquin, one female. May 3, 1894 (W. A. 

 Nason). 



Originally described from New Jersev, by Coquillett. 



The early stages are undescribed. 



Protenthes Johannsen 



There are six species occurring in Illinois which are referable to 

 this genus. Three of these, choreus Meigen, punctipetinis Meigen, 

 and culicifoniiis Linne, were described from Europe, and wdiile com- 

 mon in various parts of that continent only the latter seems to be 

 common in Illinois. The larvae of culicifoniiis were taken commonly 



