FUNGUS GNATS OF NORTH AMERICA. 3OI 



brown, wings hyaline, anterior veins brownish; posterior veins 

 pale, all other parts black; body shining, hairs pale, sparse. 

 Antennae short, intermediate joints not longer than broad. 

 Setae of hind tarsi shorter than diameter of tibia. Venation 

 as figured (Fig. 220). Hypopygium (Fig. no). Brookings, 

 S. D. (J.M.A.) • 



>^ 18. Genus Anatella Winnertz. 

 Verb. Zool.-bot. Ges. Wien. XIII. 854. 1863. 



Ocelli 3, the middle one smaller than the laterals, the latter 

 continguous to the eye margin. Abdomen slender, compressed, 

 constricted at the base. Legs long, spurs unequal. Wings 

 elongate oval, anal lobe small; costa produced far beyond the- 

 tip of the radial sector; subcostal vein very short, ending in 

 Ri ; fork of the cubitus may be proximad, under or distad of the 

 fork of the media; anal stout but incomplete (Fig. 217). Very 

 small species. 



,/. tacita is a fossil species from Colorado. 



Anatella silvestris Johannsen. 

 Genera Insectorum. Fasc. 93. 91. n;ou 

 Male and female. Length 2.5 mm. Mead brown, eyes black, 

 antennae yellowish brown, the 3 basa; joints and the palpi pale 

 yellow ; antennae about twice as lone;- as the thorax. Thorax 

 pale brown, with indications of 3 da''ker stripes; hairs pale, 

 setae black. Abdomen pale brown (venter yellowish in the 

 female), apical margin of each of tiie four ])ostenor segments 

 dark brown; hypopygium yellowish (Fig. 107). Coxae and 

 legs pale yellow, tarsi infuscated ; fore metatarsus and tibia 

 subequal in length: tarbal cl?w elbowed, apical ])art slightly 

 sinuous, curved at the tip; basal too^h very small. Wings 

 hyaline, veins dusky yellow; venation as shown (Fig. 217). 

 Halteres yellow. Ithaca, N. Y. INlarch and August. 



'1. Genus Triclioiita \\Mnnertz. £_ 



Vei :•..■/. ^cl.-bot. Ges. Wien. XIII. 847. 1863. 



Ocelli 3,. the laterals large, close to the eye margin. Abd'^men 



crmstricted at the base, compressed ; hyi'0[)ygium large. AVings 



large ; costa scarcely noticeably produced beyond the tip of the 



radial sector; subcosta long, ending in Ri beyond the middle of 



