80 THE CANADIAN ENTOMOLOGIST. 



front of ocelli but not contiguous, front a little widened at vertex, more so 

 at base of antennas, face widening at same angle, about one-half width of 

 head at widest which is the lowermost portion ; frontal bristles weak, in 

 single row, terminating at base of antennae, directed forward and inward, 

 decussate, except vertical bristles which are directed backward and hardly 

 stronger than the others ; no orbital bristles ( S )■ Face not receding, 

 rather advancing, nearly perpendicular, epistoma prominent, oral profile 

 long; facial depression about four-fifths width of face, rather triangular in 

 online, very shallow ; facial ridges bare except some very small bristles 

 just above vibrissa, only a very little constricted a good distance above 

 oral margin where the weak non-decussate vibrissae are situated, the 

 latter being distinct from the shorter bristles below which make up the 

 uniform row on the cheek borders ; sides of face very narrow, bare ; 

 cheeks very narrow, bare. Eyes bare, descending far below vibrissae and 

 about as low as oral margin. Antennae inserted nearly on a line drawn 

 through middle of eyes, short, about three-fifths length of face, third joint 

 hardly longer than second, elongate-round ; arista bare, apparently only 

 2-jointed, basal joint short, terminal joint thickened at base. Proboscis 

 nearly as long as height of head, rather slender, labella somewhat 

 developed ; palpi small, slender, filiform, but slightly thickened at tip. 

 Thorax not so wide as head ; scutellum with an apical decussate, and 

 two lateral pairs of macrochsetye. Abdomen rather wider than thorax, 

 much rounded, somewhat flattened, but convex above, first segment not 

 shortened ; macrochaetae weak, discal and marginal ; hypopygium 

 concealed. Legs not long, not stout, very little bristly, claws and pulvilli 

 of ^ only a little elongate. Wings much longer than abdomen, without 

 costal spine, third vein without bristles at base ; apical cell closed in 

 border at tip of wing, fourth vein curved, apical cross-vein nearly 

 straight ; hind cross-vein nearly straight, about in middle between small 

 cross-vein and bend of fourth. Type C. hyalomoides, n. sp. 



Clistomorpha hyalomoides, n. sp., $ . 



Eyes cinnamon brown ; frontal vitta velvet-black, narrowed pos- 

 teriorly ; sides of front, face and cheeks silvery-poUinose ; antennae and 

 arista blackish, second antennal joint more or less brownish ; proboscis 

 brown, palpi pale tawny ; occiput black, silvery below. Thorax soft 

 black, humeri broadly silvery-cinereous, continued backward on sides of 

 thorax to scutellum, pleurae silvery ; scutellum black. Abdomen black ; 

 second segment narrowly at base and with median line, third more 

 broadly at base and broadest on sides and in middle, and anal almost 



