272 NEW YORK STATE MUSEUM 
ff Fourth tarsal joint about one half of third in WENN 5 b0.000000 
Mit ples. Coqy os 
dd ‘Thoracic stripes margined with black 
@ (Gross vein waitin Clomedl occossscccccce Veit 4 SUMMOSTS Cog, WE 
cc Legs banded (ornatus group) 
d Thoracic stripes not margined with black 
g@ Gross vena wruda cede Cowal osoccsccccdecoccccoc ceca bo vcee var. 5 
G2 (irOss wei walnome clack Clowdl .osc60 50000006 var. 6. johnsoni 
dd Thoracic stripes margined with black | 
@ (Gross wei watiln Clowels oocsoo0 000 0c var. 7. Ornatus (Schiner) 
Co (Gross Wein trilnome Carls ClowGl .o.occccccacadccvccccsonccs var. 8 
aa Prevailing color of body dusky 
b Reiz present at apex of Ri, posterior margins of abdominal segments 
yellow ; cross vein not distinctly clouded ............ florens n. sp. 
OD Ikais BDSSME sooncucccs tenebrosus Cog. ’o5 and arietinus Coq. ’08 
Tanypus florens n. sp. 
Male. Resembles fastuosus but differs in being smaller, 
more slender, in having no black cloud on the cross vein and in 
having the posterior margins of the abdominal segments con- 
spicuously yellow. 
Head, with mouth parts and antennae dark brown. Thorax 
brown, sternum, metanotum and thoracic stripes somewhat cin- 
ereous, narrow spaces between the stripes with rows of yellow hairs 
upon them. Other shorter hairs on the dorsum also yellow; 
scutellum pale brown. Abdomen brown, apical %4 or % of each 
segment yellow, pale coloring more conspicuous on the sides, hairs 
yellow. Genitalia dark brown, basal joint of each limb of forceps 
ovate, its greatest diameter about % the width of the last abdominal 
segment, apical joint slender, not as long as the basal joint, curved 
clawlike, and sharply pointed. Legs yellow with yellow hairs, apex 
of each femur and base of each tibia brown, the articulation at the 
knee yellow; tarsi somewhat more dusky. Fore metatarsus about 
.6 as long as the tibia. Wings hairy, cubitus forks slightly proximad 
of the cross vein, surface brownish hyaline, when held obliquely 
appears iridescent along the veins, giving the wing a mottled appear- 
ance; hairs yellowish brown; cross vein slightly darker than the 
adjacent veins but not covered by a dark cloud; anterior cross vein 
quite oblique and longer than the posterior cross vein; R,,, near 
apex of R,, pale yellow; halteres yellow. Length 2.5 mm. Ithaca, 
N.Y.; Boulder and Florissant, Col., and Washington state. 
see 
