J. R. MALLOCH 267 



Female. — Front one-tliird the head-width; orbital and occllar l)ristles very 

 strong; orbits with numerous long hairs, some of which are over half as 

 long as the bristles; profile similar to that of male, differing in hi^ving the por- 

 tion below vibrissa almost vertical and about as long as antenna. Apical 

 abdominal segment without thorns. Chaetotaxy of legs as in male, the small 

 bristly hairs on hind tibia le.^s numerous. Length, 7.5 — 8.5 mm. 



Type. — cf ; Top of Las Vegas Range, New Mexico, June 24, 

 [A. N. S. No. 61921. Paratypes.—2d', 1 9 ; Beulah, New Mexico, 

 top of range, same date. 



This species is most closely related to hrunneinervis Stein, l)ut 

 that species differs in having the foie tibia without the short erect 

 ventral hairs, the mid feniui with long ])ristles among the hairs 

 on basal half of antero-ventral surface, the bristles on postero- 

 ventral suiface of hind femm- longer than diameter of femin-, and 

 the hind til)ia with a few scattered bristly hairs near middle, in- 

 stead of one bristle near base. 



Phaonia parviceps sp. n. 



Female. — Black, almost glossj'. Head black; interfrontalia brownish, 

 opaque; ocellar triangle and orbits glossy, the latter on their lower half, the 

 entire face, and cheeks with whitish pruinescence; antennae and j)alpi black. 

 jMesonotum with slight whitish pruinescence, which, when the thorax is viewed 

 from behind, .gives to the dorsum a quadrivattate appearance. Abdomen less 

 distinctly pruinescent than thorax, and with very faint indications of a black 

 dorso-central vitta. Legs including coxae yellow, tarsi slightly infuscated. 

 Wings clear, veins ])rown, j'ellow at bases. Calyi)tra and halteres whitish 

 yellow. 



Eyes with faint pubescence; frons at vertex about one-fourth the head- 

 width, becoming broader in front; ocellar triangle extending slighth^ bej'ond 

 middle of interfrontalia; orbit at apex of triangle one-third as wide as inter- 

 frontalia; ocellar bristles very strong, widely divergent; orbits each with five 

 strong bristles, the one nearest antennae longest, and numerous short setulose 

 hairs; antennae reaching almost to vibri.ssae, third joint over three times as 

 long as second, slightly angulate at apex on upper side; arista plumose, the 

 longest hairs slightly longer than width of third antennal joint; facial orbits 

 linear in profile; cheeks very narrow, not higher than width of third antennal 

 joint, the lower margin with a series of long bristles above which are a few 

 weak hairs; vibrissa! angle very slight, not much above lowest level of cheek, 

 the vibrissae very strong, slighth' longer than face. Thorax with three 

 pairs of postsutural dorso-central bristles; ])resutural acrostichals four-rowed, 

 the outer series on each side strongest; prealar bristle minute; hypoplcura bare. 

 Third and fourth (visible) abdominal segments each with discal bristles, the 

 series on posterior margin of third segment very strong, that on fourth much 

 weaker; apical .segment without thorns. Fore tibia with one posterior and 



TRANS. AM. ENT. SOC, XLIV. 



