FUNGUS GNATS OF NORTH AMERICA. IO9 



32. Genus Sceptonia Winnertz. 



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

 Front broad, tbe anterior margin produced into a triangle 

 the apex of which reaches the base of the antennae; lateral 

 ocelli contiguous to the eye margin, middle one minute, in a 

 groove at the base of the' triangle. Anterior margin of thorax 

 produced over the head so that in profile making a continuous 

 curve with the head. Legs strong, hind tibial setae longer than. 

 the greatest diameter of the tibia. The branches of the radius 

 curved parallel to the costa, the cells between very narrow, the 

 costa therefore apparently produced beyond the tip of Rs ; 

 subcosta short; cubitus simple; anal long but incomplete. The 

 larvae are found in decaying wood and in fungi. 



Sceptonia nigra Meigen. 



Syst. Beschr. I. 270. 1818. (Mycetophila). 

 Male and female. Length 2.2-2.5 mm. Head, thorax and 

 abdomen shining black. Antennae brown, scape sometimes yel- 

 lowish; palpi yellow. Hairs pale shimmering, setae dark. 

 Hypopygium yellowish (Fig. 96). Coxae and legs yellowish, 

 the bases of the hind coxae, the apical third of the hind femora, 

 black ; spurs and tarsi brown ; fore metatarsus a fourth shorter, 

 the entire tarsus about 2.3 longer than the tibia ; middle tibiae 

 each with a single minute seta on flexor surface. Wings hya- 

 Ine tinged with yellowish brown, with dusky yellow veins. 

 (Fig. 213). Halteres yellowish. In an occasional specimen the 

 base of the venter is obscurely yellowish. Selkirk Mts., Dowie 

 Creek and Rogers Pass, B. C. ( J.C.B.) July; Wis., (W.M.W.) ; 

 Brookline, Mass. ( C.W.J. 1 June; Ithaca, N. Y., Aug.; Orono, 

 Me., Nov. 



33. Genus Zygomyia Winnertz. 

 Verb. Zool.-b?ot. Ges. Wien. XIII. 901. 1863. 

 Front broad, the anterior margin produced into a triangle 

 which descends to the root of the antennae ; lateral ocelli con- 

 tiguous to the eye margin, the middle one minute, placed in a 

 groove at the base of the frontal triangle. Legs strong, tibiae 

 with strong setae, those of the hind tibiae longer than the great- 

 est diameter of the tibia. Costa not produced, subcosta short, 

 ending free; cubitus simple, anal vein incomplete. The larvae 

 live in decaying wood and in fungi. 



