FUNGUS GNATS OF NORTH AMERICA. I73 



Female. Similar to the male but the fore metatarsus is i 1-6 

 times the tibia in length, and the subcostal crossvein is near the 

 middle of the small cell Rj which is not quite twice as long as 

 wide ; no coxal spurs. Both sexes from Ithaca, N. Y., taken 

 in July. 



4. Mycomya calcarata Coquillett. 



1904. calcarata, Coquillett. Invertebrata Pacifica 1. 19. (Scio- 



phila) . 

 Male. Length 4 mm. Black, the extreme base of third joint 

 of antennas, halteres, genitalia largely, femora, tibiae and base 

 of first joint of tarsi yellow ; third joint of antennae nearly 3 

 times as long as broad, the following joints longer than wide ; 

 body opaque, gray pruinose, mesonotum marked with 3 black 

 vittae, the middle one divided medially by a gray line, hairs and 

 bristles of thorax black ; middle coxae bearing at apex of front 

 side a forwardly directed, 2-pointed spur which is almost half 

 as long- as the coxae; bristles of tibiae shorter than the greatest 

 diameter of the latter ; fore metatarsus slightly shorter than its 

 tibia ; wings pubescent, hyaline, subcostal vein terminates near 

 middle of cell R^, the subcostal crossvein slightly before the 

 middle of this cell, the latter about 1.5 times as long as broad, 

 Rj and R4+5 veins strongly bowed forward, peduncle of cell M^ 

 about half as long as M^, cubitus forks slightly before R-M 

 crossvein. California. 



5. Mycomya simplex Coquillett. 



1905. simplex, Coquillett, Journ. N. Y. Ent. Soc. XIII. 6"/ 



(Sciophila). 

 Male and female. Length 4 to 6 mm. Near calcarata but 

 the middle coxae are w'ithout spurs, etc. Black, the mouth 

 parts, bases of antennae, a humeral spot, base of venter, hal- 

 teres, coxae, femora, tibiae, bases of tarsi and hind borders of 

 abdominal segments of the female, yellow, hind coxae usually 

 marked with brown. Antennse elongate, the joints beyond the 

 second over twice as long as wide. Body opaque, densely gray 

 pruinose, the hairs black. First joint of front tarsi subequal or 

 slightly longer than the tibiae. Wings hyaline, subcostal vein 

 ends in costa near or beyond middle of cell R^, petiole of media 

 cell about 6 times as long as the small crossvein, cubitus forks 

 slightly before the small crossvein. British Columbia, July and 

 August. 



