126 THE CANADIAN ENTOMOLOGIST. 



outward, frontal bristles in a single row, three beneath base of antenniB. 

 Facial ridges strongly diverging froni their upper nearly to their lower 

 ends, then strongly converging, but their lower ends widely separated, the 

 ridges bristly on slightly more than the lower half; sides of face bare, 

 each one-fifth as wide as the central fovea, the latter destitute of a median 

 carina ; vibrissa rather short, inserted near the oral margin. Antennae 

 inserted considerably above the middle of the eyes, nearly as long as the 

 face, the third joint five times as long as the second, rounded at the tip ; 

 arista bare, not longer than the third antennal joint, thickened on the basal 

 four-fifths, the penultimate joint nearly one-half as long as the last one. 

 Cheeks over one-third as wide as height of eyes, wholly pilose. Scutellura 

 bearing a small, cruciate, apical pair of macrochaet?e and two long lateral 

 pairs. Abdomen elongate-oval, slightly narrower than the thorax, the 

 four segments subequal in length, destitute of a ventral process; macro- 

 chaetffi discal and marginal. Hind tibiae not ciliate, claws and pulvilli 

 nearly as long as the last tarsal joint. Apical cell open, ending the length 

 of the small cross-vein before the tip of the vving, hind cross- vein slightly 

 oblique, near the last third of the distance between the small cross-vein 

 and the bend, the latter obtuse-angular, destitute of an appendix; third 

 vein bearing two or three bristles at the base, the others bare ; penulti- 

 mate section of fifth vein nearly five times as long as the last section. 

 (Name from the Greek : isos equal and glossa tongue.) Type, the follow- 

 ing species. 



Isoglossa hastata, n. sp. — ^ Frontal vitta brown, gray pollinose, 

 subequal in width to either side of the front next the antennje ; front and 

 face light gray pollinose, a blackish spot each side between them ; 

 antennae, arista and proboscis black, the palpi yellow. Thorax and 

 scutellum black, gray pollinose, the former with four black vittae and three 

 post-sutural macrochaetae. Abdomen black, opaque gray pollinose, the 

 sides of the last three segments broadly orange-yellow, the two spots meet- 

 ing on the hind end of the last segment ; genitalia black, protruding one- 

 fifth the length of the last segment beyond the latter. Legs black. Wings 

 hyaline, calypteres white. Length, 6 mm. Southern California. A 

 single specimen in April. 



Drepanoglossa occidentaiis, n. sp. — $ Arista thickened on the basal 

 fourth, proboscis beyond the basal articulation one-half longer than height 

 of head. Frontal vitta brownish-yellow, three-fourths as wide as either 

 side of front next the antennae, sides of front and face whitish pollinose ; 



