Dec, I902.J CoQUILLETT: NeW NoRTH AMERICAN DlPTERA. 183 



bristles, a bristle at lower posterior corner of each cheek ; mesonotum and scutellum 

 olive gray, pleura whitish-gray pruinose ; abdomen brownish black pruinose, the 

 last segment and front angles of the two preceding segments whitish pruinose, on the 

 penultimate segment reaching at least nearly halfway to the middle of the dorsum ; 

 wings hyaline, apex of second vein slightly beyond the middle between apices of the 

 first and third veins. Length, 1.5 mm. 



/Ta^//^/.— Vieques Island, Fajardo, Mayaguez, Aguadillo, Utuado 

 and Arroyo, Porto Rico. 



Eight specimens collected in January and February, 1889, by Mr. 

 August Busck. Type No. 6642, U. S. N. M. 



Parephydra, gen. nov. 



Near Discocerina, but the ocellar bristles are inserted higher than the lowest 

 ocellus, the oral opening is unusually large, etc. Head with a deep concavity at base 

 of antenna, face with a low, median carina on the upper part, the remamder convex, 

 at the oral margin projecting farther forward than at any other part, oral margm bare, 

 clypeus hidden, front nearly flat, two pairs of vertical bristles, no postverticals, two 

 pairs of fronto-orbitals, second joint of antennae bearing two short bristles at the 

 upper inner angle, third joint suborbicular, arista long-pectinate on the upper side, 

 legs without bristles, venation as in the related genus. 



Type, the following species : 

 Parephydra humilis, sp. nov. 



Black, the base of third antennal joint, the halteres and tarsi except their apices, 

 yellow • front yellowish, the face light gray pruinose, face bearing three pairs of 

 bristles and one near lower posterior corner of each cheek ; body opaque, gray prui- 

 nose whitish on the abdomen, mesonotum except the sides brownish, one pair of 

 acrostichal bristles and one of dorsocentrals, the bristly hairs short, sparse, not ar- 

 ranged in rows, two posthumeral bristles, two mesopleural and one stemopleural, 

 pleura otherwise almost bare, scutellum bearing four bristles; abdomen oval, com- 

 posed of five segments which increase in length toward the apex ; wings hyahne, hmd 

 crossvein faintly clouded with brown, apex of second vein slightly beyond the middle 

 of distance between apices of first and third veins. Length, nearly i mm. 



Hadiiat.—YLot Springs, Yavapai Co., Arizona. 



A single specimen collected June 26 by Mr. H. S. Barber. Type 

 No. 6643, U. S. N. M. 

 Coenia bisetosa, sp. nov. 



Head and its members black, middle of front bronze green, not pruinose, sparsely 

 covered with short hairs but without long bristles, two pairs of orbital bristles, third 

 joint of antenna without a long hair, arista rather long- pectinate on the upper side, 

 face and cheeks opaque, light gray pruinose; thorax blackish, opaque, yellowish- 

 gray pruinose, apparently five pairs of dorsocentral bristles, no acrostichals, scutellum 

 bluish, not pruinose, bearing two pairs of bristles, abdomen olive green, broad bases 

 of the la.st three segments violet bronze, segments two to five slightly increasing in 



