98 MAINE AGRICUI,TURAI, e;xP£;RIMENT STATION. I912. 



to the 3 following joints taken together; middle tibise each with 

 2 setae on flexor surface. Wing with a central spot, apex of 

 wing posteriorly more grayish. "Middle States." 



Male and female. The female as above though the humeri 

 are more yellowish. The male differs in having less yellow on 

 the abdomen and the middle tibiae each with 3 setge on the 

 flexor surface. Hypopygium (Fig. 79). Chicago, III, 

 (W.M.W.), May; Ithaca, N. Y., May- Aug. ; R. I. (J'.B.) ; 

 Wis., (W.M.W.). 



23. Mycetophila scalaris Loew. 



Berl. Ent. Zeitschr. XIII. 154. 1869. 

 J\Iale and female. Length 3 mm. Head luteous, antennne 

 subfuscous, scape and the base of the flagellum yellowish. 

 Mesonotum yellowish, moderately shining, with 3 dark, some- 

 times confluent stripes; hairs yellow, setse black; scutellum yel- 

 low, lateral angles black; anterior part of pleura yellow, poste- 

 rior part and the metanotum fuscous. First abdominal segment 

 yellow, margin dusky, sometimes with median yellow line, seg- 

 ments 2, 3 and 4 each with a large blackish spot on each side 

 which rarely may meet on the dorsum; segments 5 and 6 with 

 yellow hind margin, apex of abdomen and venter yellowish. 

 Coxae and legs yellow, hind femora with black tips, tarsi sub- 

 fuscous, middle tibia with 3 setae on flexor surface; hind 

 metatarsus about as long as the remaining joints taken together. 

 Wing with a central spot and a ]3reapical fascia which fills the 

 apex of cell Ri and extending obliquely proximad into cell Rs, 

 below this the veins of the media are indistinctly surrounded 

 by a grayish cloud. "Middle States." The robust hind tibiae 

 each have 2 ranges of setae on the extensor surface ; hypopygium 

 (Fig. 80). The hypopygium of Var. a. differs in being more 

 elongate (Fig. 82). Reared from Boletus and Polyporus 

 Ithaca, Nl Y., June-Oct. ; Lawrence, Kas., (E.S.T.) July; 

 Brookside, N. J., Selkirk Mts., B. C. f J.C.B.) ; Vt, (C.W.T ) 

 Woods Hole, Mass.; Wis., (W.M.W.). 



24. Mycetophila piiiguis Loew. 



Berlin. Ent. Zeitschr. XIII. 153. 1869. 

 Female. Length 4 mm. Front brownish, antenna? sub- 

 fuscous, scape and the very base of the flagellum yellowish. 



