No. 64] DIPTERA OF CONNECTICUT : TAXONOMY 249 



13. Thoracic pleura with a transverse dark brown stripe involving the cephalic 



portions of the anepisternum and sternopleurite subeluta 



Thoracic pleura unmarked 14 



14. Wings very poorly marked with whitish, the pale areas in cell M and at the 



cord ill-defined to almost obsolete ; veins brown, contrasting with the 

 ground-color ; male hypopygium with the tergal lobe at apex shallowly bifid 



(Fig. 28, K) kennicotti 



Wings with central portion of disk conspicuously brightened ; veins yel- 

 low ; male hypopygium with the tergal lobe obtuse, entire 15 



15. Abdominal tergites with dark sublateral stripes vitrea 



Abdominal tergites without stripes 16 



16. Coloration of thorax and abdomen reddish brown, the terminal abdominal 



segments scarcely darkened; male hypopygium without a pencil of setae on 



either side of median lobe of tergite sackeniana 



Coloration more grayish, praescutal stripes brownish gray; outer abdominal 

 segments extensively inf uscated ; male hypopygium with a pencil of long 

 setae on either side of median lobe of tergite tricolor 



17. Antennae with basal enlargements of flagellar segments light yellow, the 



remainder dark brown or black tephrocephala 



Antennae with the flagellum uniformly darkened, or, if bicolorous, the basal 

 enlargements of the individual segments dark, the remainder paler 18 



18. Costal border of wings dark brown, the color involving the cephalic border 



of cell R and all of cells Ri and Sc2 sayi 



Costal border of wings only moderately if at all darkened, the coloration 

 yellowish to brownish yellow, including cells C and Sc but not passing 

 caudad beyond level of vein R 19 



19. Wing-apex darkened Iroquois 



Wing-apex clear 20 



20. Antennal flagellum bicolorous ; size large (wing, $ , over 16 mm.) 21 



Antennal flagellum uniformly blackened ; size smaller (wing, $ , under 



14 mm.) 22 



21. Stigma brown, conspicuously darker than the yellowish costal border; veins 



dark brown, conspicuous ; male hypopygium with the tergite dark, termi- 

 nating in two slender yellow finger-like lobes (Fig. 28, C) cayuga 



Stigma pale brownish yellow, concolorous with the costal border ; veins 

 pale, yellowish or brownish yellow, inconspicuous against the ground ; male 

 hypopygium with the tergite terminating in an obtuse median black lobe 

 (Fig. 28, J) jacobus 



22. Abdomen gray, the tergites more brownish medially ; antennae black through- 



out 23 



Abdomen brownish yellow to obscure orange, at least basally; antennae 

 with basal segments yellowish 24 



23. Male hypopygium with caudal margin of tergite bearing four lobes, there 



being two parallel submedian ones between the lateral divergent pair 



(Fig. 28, A) aprilina 



Male hypopygium with caudal margin of tergite bearing two divergent lobes, 

 usually with a low rounded tubercle between (Fig. 28, E) dejecta 



24. Scutellum and postnotum gray, concolorous with the thoracic pleura; male 



hypopygium with caudal margin of tergite with three low lobes, the 



laterals fully as high as the very broad median lobe (Fig. 28, H) grenfelli 



Scutellum and postnotum, including pleurotergite, light sulphur-yellow, 

 contrasting abruptly with the light gray pleura; niale hypopygium with 

 caudal margin of tergite terminating in two submedian lobes (Fig. 28,0) 



sulphurea 



Tipula (Tamafotipula) aprilina Alex. (Fig. 28, A). 

 1918. Tipula aprilina Alexander; Can, Ent., 50: 63-64. 



Male hypopygium with tergite (Fig. 28, A) large, reddish brown; 

 lateral lobes blackened, with microscopic tubercles; submedian lobes 



