FUNGUS GNATS OF NORTH AMERICA. 8l 



ff. With diffuse apical wing cloud; hypopygium (Fig. 

 65). 6. recta n. sp. 



ee. Dark brown or blackish species; hypopygium (Fig. 66). 

 f. Wing with hyaline spot under Rs (Fig. 191). 



7. fenestrata. 



ff. Wing not marked thus. 7a. var. praenubila n. va*". 



cc. Preapical wing cloud sharply defined with an anterior spur 



which fills out the apex of cell Ri ; middle tibiae each with 



2 or 3 setae on flexor surface. 8. impellans n. sp. 



I. Mycothera analis Coquillett. 



Proc. U. S. Nat. Mits. XXIII. 598, 1901. {Bxechia). 

 Male. Length 2 mm. Head black, the! face, mouth parts 

 and base of antennae yellow; thorax black slightly polished, a 

 small triangular 3^ellow spot below the humeri ; abdomen dark 

 brown, the third and fourth segments, except hind margin of 

 the latter, yellow ; legs yellow, the broad apices of hind femora 

 dark brown, tarsi brownish yellow ; wings hyaline, a brown 

 facia fills the apex of cell Ri and crosses cell Rs. "Delaware 

 AA^ater Gap, N. J." 



2. Mycothera paula Loew. 



Berlin. Ent. Zeitschr. XIII. 151, 1869. 

 trifasciata Coq. Invert. Pacifica I. 18. 1904. (Mycetophila). 



Male and female. Length 2.2-2.5 ^n^- Head fuscous, an- 

 tennae brown, the 3 or 4 basal joints and the palpi yellow. 

 Mesonotum reddish brown, opaque, the front and lateral mar- 

 gins and front angles yellow; hairs yellow, setee brown; scutel- 

 lum yellow, pleura and metanotum brown. Abdomen black, 

 genitalia (Fig. 62) yellow. Legs yellow, tips of hind femora, 

 of middle and hind tibise, and the larger part of the tarsi, 

 brown ; middle tibia; each with 2 setae on flexor surface. Wing 

 grayish hyaline with, 3 brown fasciae (Kig. 187). Halteres yel- 

 low. 



I have seen the types of paula and trifasciata, and they do 

 not appear to differ. "Middle States," "Stanford Univ., Cal. ;" 

 Carbondale Landing. Columbia River, B. C, (J.C.B.) ; Ithaca, 

 X. Y., Aug., Oct.; Brookside, N. J^ (Weidt). 



