268 MAINS AGRICUI.TURAI, i;xPE:rIME;nT STATION. I909. 



2. M aero c era sp. 

 Female. Length 4 mm. Antennse partly missing; the first 

 flagellar joint about as long as the second fore tarsal joint. 

 Color reddish yellow, head infuscated ; three wide black thor- 

 acic stripes ; basal half of each abdominal segments blackish, 

 last segment black; venter mainly yellowish; legs yellow, tarsi 

 infuscated; fore metatarsus about .6, second tarsal joint about 

 -3 as long as the tibia. Wing hyaline; medium brown band 

 extends from apex of Ri diagonally proximad to the posterior 

 branch of the cubitus filling the space traversed by the petiole 

 of the media; apex of the wing at the tip of R4+5 slightly yel- 

 lowish ; apex of Ri slightly thickened ; Rr;+3 ends nearly midway 

 between apices of Ri and R^-h^. One defective and apparently 

 discolored specimen from Little Wind River, Wyoming, taken 

 in September by W. M. Wheeler. 



3. Macroeera ineoncinna Loew. 



1869. ineoncinna Loew. Berl. Ent. Zeitschr. XIIL 133. 



Female. Length 3mm. Yellowisih, thoracib stripes and 

 abdominal fascise indistinctly pale brownish. Antennae over 

 one and one-half times as long as the body ; the flagellum black. 

 Legs pale yellowish, tarsi deep fuscous. Wing cinereous, 

 toward the ti23 and toward the posterior margin with longer 

 pile and a little more deeply cinereous ; Ri thickened at the apex ; 

 R2+3 short, oblique ; on the disk with a large subfuscous spot, 

 extending from a fuscous longitudinal line which lies in the 

 cell Ri to Cu2; also a faint cuneate spot in the basal cell R; 

 length of the wing 4 mm. Halteres yellow. Recorded from the 

 District of Columbia. In the type specimen the apex of R2-I-3 is 

 close to tip of Ri and widely remote from Ri+s, as in M. elara. 



4. Maeroeera sp. 

 Two defective specimens from Pine Lake, Wisconsin, col- 

 lected by Prof. W. M. Wheeler, resemble immaeulata and 

 ineoneinna in some respects but differ from each. The petiole 

 of the media is surrounded by a very faint cloud ; the subcosta 

 ends about opposite the coalesced part of the media; Ri is thick- 

 ened at the tip and ends less than the length of the petiole of 



