200 THE CANADIAN ENTOMOLOGIST. 



articulation shorter than height of head, labella small, palpi short, 

 clavate ; hind tibial evenly ciliate with rather short bristles on the 

 anterior-outer side ; first posterior cell open, ending noticeably before the 

 wing-tip, bend of fourth vein without an appendage, hind crossvein nearer 

 to the bend than to the small crossvein, base of third vein bearing a single 

 bristle, other veins bare. 



Type. — Brachycoma pallidula, v. d. Wulp (Biol. Cent. -Am., II., p. 

 95), from Yucatan, Mexico. Five males and eight females are before me 

 from San Rafael, Vera Cruz, Mexico. 



MicropJithalma pruinosa, new specie?. 



Head yellow, occiput and sides of front black, the latter yellowish 

 pruinose, frontal vitta brownish black ; vertex one-third as wide as either 

 eye, sides of face sparsely covered with black bristly hairs, antennae 

 nearly half as long as the face, yellow, the third joint, except at base, 

 black, nearly twice as long as the second, vibrissa? near one-third of 

 distance from anterior oral margin to base of antennae, cheeks posteriorly 

 about as wide as the eye-height, palpi yellow, proboscis dark brown ; 

 body wholly grayish pruinose, black, the broad sides of abdomen and the 

 genitalia yellow, mesonotum marked with four black vittae, three post- 

 sutural dorsocentral bristles, three sternopleurals, second and third 

 abdominal segments bearing marginal bristles, the fourth covered on the 

 apical half; legs black, tibiae largely yellow, pul villi greatly elongate ; 

 wings hyaline, tinged with yellowish brown at base and along the veins, 

 costal spine very long, a long stump at bend of fourth vein, calypteres 

 whitish; length, 9 to 12 mm. Four males. 



Habitat. — White Mts., New Mexico (South Fork Eagle Creek, 

 altitude about 8,000 feet, August 13th); and Sierra Madre, Chihuahua, 

 Mexico (head of Rio Piedras Verdes, altitude about 7,300 feet, July 19th). 



Type.— Cat. No. 6298, U. S. N. M. 



Araba nebulosa, new species. 



Black, including the palpi ; front golden-yellow pruinose, greatly 

 narrowed anteriorly, vertex three-fourths as wide as either eye, uppermost 

 frontal bristle in each row over twice as far from the one in the opposite 

 row as from the adjacent eye, a reclinate bristle between it and the eye, 

 two pairs of orbital bristles, sides of face bearing a row of short black 

 hairs near the eye, ridges bristly on the lower three-fifths, frontals 

 descending to middle of second antennal joint, antennae slightly shorter 

 than the face, the third joint four times as long as the second, arista 



