INSECTS OF BERLAH, NEW MEXICO. 103 



and very slender, palpi very short, clavate ; antennse four-fifths as 

 long as face, the third joint narrow, slightly over three times as long 

 as the second, arista pubescent, the penultimate joint slightly longer 

 than broad ; eyes bare, cheeks one half as wide as the eye-height, 

 ocellar bristles directed forward; third vein bristly nearly halfway 

 to small cross-vein, other veins bare, third vein ending far before 

 the extreme tip of wing, first posterior cell closed, its petiole about 

 one-fourth as long as the hind cross vein, bend of fourth vein nearly 

 rectangular and furnished with a long stump of a vein, hind cross 

 vein much nearer bend of fourth vein than to the small cross-vein, 

 last section of fifth vein less than one third as long as the preceding 

 section. 



Type, the following species : 



Trochilodes skinneri n. sp.— Black; the frontal vittse dark brown; 

 first two joints of antenna; and base of the third yellowish brown ; middle and 

 lower part of sides of face and the cheeks, also the palpi, yellow ; front one and 

 one-half times as wide as either eye ; two pairs of orbital bristles; frontal bris- 

 tles in single rows, scarcely descending below base of antenna; ; sides of face 

 each bearing about two irregular rows of stout bristles extending from the front 

 nearly to the vibrissa? ; facial ridges bristly on the lowest fourth; arista thick- 

 ened on its basal three-fifths; body opaque, gray pruinose; the fourth abdominal 

 segment very thinly pruinose, somewhat polished ; mesonotum with a pair of 

 interrupted subdorsal black vittas, three pairs of postsutural dorso-central bris- 

 tles, three sterno-pleurals ; abdomen on first three segments with olivaceous, 

 changeable spots, the last three segments with discal and marginal bristles; mid- 

 dle tihiye bearing three stout bristles on the outer anterior side, the same on the 

 outer-posterior side and one below middle of inner side; hind tibia; not filiate ; 

 pulvilli elongated ; wings hyaline ; calypteres white. Length 9 mm. 



One specimen, Beulah, New Mexico. August 17th. Type re- 

 ceived for naming from C. W. Johnson, of Philadelphia, to whom, 

 by request, it has been returned. 



Pegomyia nilidula n. s\).—Male — Black ; the halteres yellow; eyes 

 approximate; frontal vitta at narrowest point slightly wider than the lowest 

 ocellus; front and epistoma not prominent; antenna; slightly shorter than the 

 face, the third joint a trifle longer than the second ; arista with a short pubes- 

 cence; sides of face and lower corners of front whitish pruinose: proboscis mod- 

 erately robust; mesonotum opaque, grayish black pruinose; the region of the 

 humeri light gray: abdomen depressed, polished, not grayish pruinose; hypopy- 

 gium large; venter without processes and long bristles; front tibia; bearing a 

 bristle on the inner-posterior side; middle tibiae with one on the outer-anterior 

 two on the outer-posterior and two on the inner-posterior side; middle femora 

 bristly on the basal two-thirds of the under side ; hind femora bristly on the api- 

 cal three-fourths of the under side; hind tibia' bearing a small bristle on the 



TRANS. AM. ENT. SOC, XXIX. FEBRUARY. 1903. 



