ADAMS : DIPTEROLOGICAL CONTRIBUTIONS. 37 



vein and slightly beyond the junction of the basal and middle 

 thirds of the discal cell. Length, 4.5 mm. ; wing, 5.2 mm. 



One specimen ; New Mexico, August. Collected by Prof. F. 

 H. Snow. 



SAPROMYZID-ffi. 

 Pachycerina dolorosa Will. 



Pachycerlna dolorosa, n. sp., Williston MS. 



Female : Reddish yellow, shining vertical spot, under side of 

 the third joint of the antennae and the abdomen black ; wings 

 brown ; head as in P. verticalis, the ocellar spot larger, the 

 third joint of the antennae longer, and distinctly black on the 

 under side ; the palpi narrower, eyes a little smaller, the 

 cheeks broader, and the face somewhat more receding ; meso- 

 notum with a median black or deep brown stripe ; femora 

 dark brown at the base ; front femora, otherwise, brownish ; 

 front tibise and tarsi, except the immediate base of the former, 

 black, middle tarsi brownish ; wings brown, deeply so along 

 the costa ; penultimate section of the fourth vein nearly as 

 long as the ultimate section. Length, 5 mm. 



Abdomen shining black. 



Five specimens ; Colorado. Comstock. No. 241, Morrison. 



(The above description is Doctor Williston 's.) 



OSCINID^. 



Chlorops. — Table to the species. 



1. Mesonotum black, at most with sides yellow 2 



Mesonotum not so colored 11 



2. Legs largely black 3 



Legs largely yellow 5 



3. Front with a median sulcus fossulata Loew. 



Front without a median sulcus 4 



4. Palpi black pullipes Coq. 



Palpi yellow bilineata, n. sp. 



5. Mesonotum grayish pollinose 6 



Mesonotum not grayish pollinose 7 



6. Third antennal joint linear nigricans Loew. 



Third antennal joint ovate pit^c^r/^es Lt ew. 



7. Hind tibite brown or black in the middle 8 



Hind tibige reddish yellow or yellow 9 



8. Scutellum piceous procera Loew. 



Scutellum yellow scabra Coq. 



9. Palpi black abdoniinalis Coq. 



Palpi yellow 10 



