rUNGUS GNATS 01^ NORTH AMERICA. \2J 



palpi fuscous ; dorsum of thorax yellowish to rufous, the scutel-: 

 lum of the metathorax with variable dark stripes, in some speci- 

 mens hardly discernible ; pleura yellow ; wings hyaline, anterior 

 veins fuscous ; knob of halteres fuscous with yellow tip, pedicel 

 yellowish, tip of trochanter black; coxa and femur dull yellow; 

 tibia darker; tarsi fuscous apically, abdomen fuscous except 

 the yellow terminal segment bearing the large ochreous claspers 

 which are tipped with fuscous (Fig. iii). Costa and radius 

 with setae, Ri ends about opposite the fork of the media, the 

 base of Rs proximad of the mid point between the humeral 

 crossvein and the tip of Ri, Rs ends slightly proximad of the tip 

 of Ms; petiole of the cubitus less than half as long as the basal 

 section of the media; cubitus produced over 3-4 of distance 

 from tip of Rs to tip of Ml Reared from decaying blackberry 

 roots. "Atlantic Co., N. J." 



II. Sciara tridentata Riibsaamen. 



Gronlandische Mycetophiliden, etc. 107. 1898. 

 validicornis Lundbeck. Dipt. Groenl. i. 243. 1898. 

 Male. Length 3 mm., wing 3.5 mm., antenna 1.5 mm. 

 Shining black, lateral stripe of abdomen scarcely paler ; halteres 

 and palpi fuscous. Flagellar joints scarcely longer than wide, 

 except the last which is 1.5 as long as wide. Ri ends about 

 opposite the base of the fork of M, base of Rs arises a little 

 distad of the mid point between humeral crossvein and the tip, 

 of Ri ; costa produced about half way from the tip of 

 Rs to Mi; petiole of cubitus somewhat shorter than basal 

 section of the media. Clasper as figured (Fig. 109). "Green- 

 land ; Lowe Inlet, B. C." 



12. Sciara munda n. sp. 

 Male. Length 3 mm. Black, antennae wholly, palpi, halteres 

 and apical part of abdomen fuscous black, thorax subshining; 

 base of abdomen brown ; coxae and legs pale brown, tarsi 

 darker; hind tibia and tarsi subequal. Hypopygium black, 

 clasper (Fig. 105). Wings subhyaline, veins strong (Fig. 224). 

 Friday Harbor, Washington (J.M.A.). 



13. Sciara dux n. sp. 

 Male. Length 2.5 mm. Black, thorax shining, second joint 

 of scape, petiole of halteres, coxae and legs yellow, tarsi dusky; 



