NEW MUSCOID FLIES — TTATT. 203 



the first at the basal fourth, the second at the basal third, and the 

 last at the apical fourth, with one dorsal subapical bristle, four 

 anterior dorsal bristles in a widely spaced row, two anterior ventral 

 bristles, the first near the middle, the se<;ond near the apical fourth, 

 and four bristles in a short row near the middle posteriorly. 



Female.— Like male except for normal sexual differences. 



Type locality. — ^Portland, Oreg. 



Type and paratypes. — U.S.N.M. no. 51695. 



Host plant. — Carnation. 



Remarks. — Described from a type (male) and a series of 23 para- 

 type male and female specimens reared during the summer of 1936 

 as an economic pest of carnation by Charles Doucette at Portland, 

 Oreg. 



The species described above differs from Hylemya trichodactyla 

 Rondani (of which Hylemya -jioreliga Zetterstedt is a synonym) in 

 that the fore tibial spur is sharp, not blunt; the hind femur does 

 not have posterior ventral bristles on the apical half: the middle 

 metatarsus is not setulose above; and the hind tibia does not have 

 a row of posterior ventral setulose hairs. It differs from Hylemya 

 planipalpua Stein (which is a valid species and not a synonym of 

 Hylemya -jioreliga Zetterstedt) in the presence of a well-developed 

 anterior ventral bristle near the basal third and in the absence of 

 a posterior ventral series of setulose hairs on the hind tibia. Hyle- 

 mya dbdena differs from other species in the genus in the male geni- 

 talia and in combinations of chaetotaxal characters. 



Genus ZENILLIA Robineau-Desvoidy 



ZENILLIA (SISYROPA) NOX, new species 

 FlGTJBE 20 



Made. — Head (fig. 20, a) with front produced anteriorly, approxi- 

 mately one-third width of one eye; antennal axis to vibrissal axis 

 as 7 is to 5; frontal stripe dark brown and as wide above as one 

 parafacial; ocellar bristles distinct and proclinate: outer vertical, 

 postvertical, and vertical bristles present; outer orbital bristles ab- 

 sent : frontal bristles about 12, the rows diverging widely below to 

 nearly the apex of the second antennal segment ; parafrontals gray 

 pollinose and with numerous scattered black setalike hairs; para- 

 facials silvery gray pollinose, bare, facial ridges bare ; antenna black, 

 third segment three times as long as second and reacliing three-fifths 

 the distance to the vibrissae, which are well developed and at the 

 oral margin : antennal bases hardly separated ; arista with micro- 

 scopic pubescence on basal fourth, thickened, penultimate segment 

 not longer than wide ; clypeus moderately deep ; a slight carina pres- 



