942 ~ CHARLES Paut ALEXANDER 
others). Wing pattern characteristic, with whitish or hyaline spots at the ends of the veins 
at the wing margin; ninth tergite tending to be notched, and often rather massive. 
T. abdominalis (Say) 
19. The dejecta group.— Ninth tergite with two lobes on the cauda! margin, in 7. iroquois 
slender and lying parallel, in 7. dejecta more divergent; ninth tergite strongly fused with 
the sternite in 7’. dejecta, the condition found in the remaining groups to be considered. 
T. iroquois Alex. 
T. dejecta Walk. 
T. aprilina Alex. 
20. The tephrocephala group.— Sclerites of the ninth segment fused into a continuous ring; 
ninth tergite with two slender parallel lobes on the caudal margin. 
T. tephrocephala Loew 
T. cayuga Alex. 
21. The tricolor group.— Species with striate wings. This group is divisible into the 
following two subgroups, which pass readily into each other: 
a. The tricolor subgroup.— Wings with a heavy striate pattern. 
. sayt Alex. 
. tricolor Fabr. 
. caloptera Loew 
. bella Loew 
. fraterna Loew 
strepens Loew 
eluta Loew 
. conspicua Dietz 
. ludoviciana Alex. 
. sackeniana Alex. 
. vicina Dietz 
perlongipes subgroup.— Wings subhyaline. 
. perlongipes Johns. 
T. sulphurea Doane 
T. kennicotti Alex. 
The tricolor group has the sclerites of the ninth segment fused into a continuous ring; 
the ninth tergite has a single broad, depressed, median lobe, which in some species is indis- 
tinctly cut in two by a median split. 
22. The cunctans group.— Sclerites of the ninth segment fused into a continuous ring; 
ninth tergite with a conspicuous median notch. 
T. cunctans Say 
T. ultuma Alex. 
Ss 
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re eH Sy es S| Se | ee ee Ste eels 
The local species of the genus Tipula may be separated in accordance 
with the following key: 
1. Wings with a distinct pubescence in the apical cells.............. 0... ccecee eee eeee 2 
Wings without pubescence in the apical cells. (Subgenus Tipwla Linn.)............. 5 
2. Pubescence of wings abundant, including all the apical cells from R: to M.z; coloration 
dull as in species of Oropeza; antennae black, the scape light yellow; thorax brownish 
gray, the prescutum with three darker brownish gray stripes; basal deflection of 
Cu, and the m-cu cross-vein at or near the fork of M; male hypopygium with each 
caudo-ventral angle of the ninth sternite prolonged caudad into a pale, slender, 
finger-like lobe. [Proc. Boston Soc. Nat. Hist., vol. 34, no. 5, p. 1381. 1909.] (Plate 
XLITI, 195, wing; Plate XLIX, 258, ninth tergite; Plate LIII, 330, lateral aspect of 
male hypopygium.) (Subgenus Trichotipula Alex.)........... T. oropezoides Johns. 
Pubescence of wings less abundant, not extending beyond cells Rs, Rs, Mi, and M» and 
confined to the centers of the cells; coloration usually bright as in Nephrotoma, or 
else the prescutum dark-colored with pale stripes 
