'2'J2. NEW YORK STATE MUSEUM 



// Fourth tarsal juint about one lialf of third in length 



m i r i p e s Coq. '05 

 dd Thoracic stripes margined with lilack 



c Cross vein with cloud var. 3. sin u o s u s Coq. '05 



cc Cross vein without cloud var. 4 



cc Legs banded (ornatus group) 



d Thoracic stripes not margined witli black 



c Cross vein with dark cloud var. 5 



cc Cross vein without dark cloud var. 6. j o h n s o n i 



dd Thoracic stripes margined with black 



c Cross vein with cloud var. 7. ornatus (Scliiner) 



cc Cross vein without dark cloud var. 8 



cia Prevailing color of body dusky 



h i?2-)-3 present at apex of Rx, posterior margins of abdominal segments 



yellow ; cross vein not distinctly clouded f 1 o r e n s n. sp. 



hh RiJ^T. absent t e n e b r o s u s Coq. '05 and arietinus Coq. '08 



Tanypus florens n. sp. 



Male. Resembles fastnosiis 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 th(5racic 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 34 or Yj, 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 y> 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 proxiinad 

 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 clmid ; anterior cross vein 

 quite oblique and longer than the posterior cross vein ; R0+3 near 

 apex of Ri, pale yellow; halteres yellow. Length 2.5 mm. Ithaca. 

 N.Y. ; Boulder and Florissant, Col., and Washington state. 



