FUNGUS GNATS OF NORTH AMERICA. 1 55 



2. Diomonus magniUcus n. sp. 



Male. Length 8 to 12 mm. Head shining blackish brown, 

 hairs mainly yellow ; face strongly produced, yellow, palpi and 

 other mouth parts yellow, scape of the antennae yellow, the pile 

 on the under side of the first joint yellow; flagellum fuscous, 

 its first joint about 4 times as long as wide. Thorax and abdo- 

 men fulvous with yellow hair ; the tergites with brownish pos- 

 terior margins. Legs yellow, tarsi slightly darker ; fore meta- 

 tarsus about I ^ times as long as the tibia ; all claws with 2 

 teeth each ; empodium represented by a few short setae. Hypo- 

 pygium resembling that of D. pulcher but the serrate lateral 

 margin of the apex of the appendage marked "a" in figure 125 

 is much shorter (fig. 114). Wings hyaline, yellow tinged, veins 

 yellowish to yellowish brown, setae black, of greater length than 

 the diameter of the largest vein, conspicuous; costa extends a 

 very little beyond the tip of R4+5 ; the subcostal vein ends in the 

 costa about opposite the distal end of the small cell R^ which 

 is nearly twice as long as wide ; the subcostal crossvein is placed 

 but slightly distad of the proximal end of the cell R^^ ; R^+g is 

 nearly straight and ends before the tip of the wing; petiole of 

 the media is nearly half as long as M^ ; the cubitus forks notice- 

 ably proximad of the R-M crossvein ; anal vein strong but in- 

 complete ; a brown spot covers the small cell and the crossvein ; 

 a preapical triangular spot the apex of which is produced to 

 the media ; a faint cloud follows the course; of the petiole of the 

 media and another the course of Cuj, broadening on the mar- 

 gin. Halteres yellow with more or less infuscated knob. 



Female. Similar to the male except for sexual characters. 

 Ithaca, N. Y. ; Salineville, Ohio; Mt. Greylock, Mass., (Owen 

 Bryant, collector). 



3. Diomonus nchulosus Walker. 

 1848. nchulosus, Walker. List. Dipt. Brit. Mus. L 87. 

 Body purplish black, shining; palpi tawny; feelers bright 

 yellow, black towards the base, a little longer than the chest, 

 having 15 or 16 joints; first and second joints dark red; mouth 

 dark red ; legs black ; tips of the hips and thighs at the base 

 pale yellow ; hind thighs armed beneath, near their tips, with 

 long, stout spines ; knees yellow, shanks with two long spines 

 at their tips ; feet reddish brown ; wings slightly tawny, with 

 gray tips, and each having a brown spot near the fore border 



