310 DIPTERA FROM SOUTHWESTERN UNITED STATES 



femur with long bristles on antero- and poster o -ventral surfaces, those on 

 the former more closely placed and much the strongest; fore and mid tibiae 

 with or without a weak posterior bristle; hind tibia usually with three antero- 

 dorsal and three postero-dorsal bristles, the lowest pair not much below middle; 

 antero-ventral surface sometimes with one to two weak setulae; tarsi on 

 all legs distinctly shorter than tibiae, the posterior surfaces of mid and hind 

 pairs with short suberect setulose hairs. Costal thorn weak; outer cross- 

 vein straight; apex of wing rather pointed, third vein ending almost exactly 

 in tip. Length, 7 mm. 



Type. — d^ ; Redwood Canon, Marin County, California, May 

 17, 1908, [A. N. S. No. 6216]. Paratypes.—2 specimens; Lagun- 

 itas Cafion, Marin County, California, March 29, 1908. 



This species bears a strong resemblance to spiniventris Coquil- 

 lett, but the fifth sternite and chaetotaxy of the legs separate it 

 from that species and its allies. 



Hylemyia neomexicana sp. n. 



Male. — Black, .subo])aciue, denselj" graj' pruinesccnt. Head black, frontal 

 triangle, face, greater portion of parafacials, and cheeks rufous; antennae, 

 pro])oscis, and jmlpi black. Thorax without vittae. Abdomen with a mod- 

 erateK' broad, black dorso-central vitta. Legs black, tibiae pale, reddish, 

 but the specimen is sUghtly teneral and in mature examples the legs may be 

 entirely black. Wings clear. Cah'^ptra white. Halteres pale. 



Eyes separated by about width of anterior ocellus; parafacials in profile 

 about as wide as third antennal joint; cheek nearly twice as high as width of 

 l)arafacial, marginal bristles long but not strong, in a single series, three to 

 four on anterior half upwardlj' directed, vil)rissa long; arista with the longest 

 hairs about equal in length to basal diameter of arista. Presutural acrosti- 

 chals long but irregular, two distinct pairs in type; prealar bristle minute or 

 absent. Abdomen depressed, parallel -sided; hypopygium small; fifth sternite 

 deeply cleft, the lateral processes not very long, armed with dense, short, erect 

 bristly hairs on inner sides and with some discal bristles which become longer 

 at apex. Fore tibia with one posterior bristle at middle; mid femur with a 

 series of long bristles on basal half of postero-ventral surface; mid tibia with 

 one antero-dorsal, two postero-dorsal, and two postero-ventral bristles; hind 

 femur with a complete series of bristles on both antero- and postero-ventral 

 surfaces, the former much stronger and longer than the latter; hind tibia with 

 three postero-dorsal bristles, and long erect setulose hairs on all the other sur- 

 faces, the longest of which is almost twice as long as diameter of tibia; all 

 tarsi sUghtly compressed, with the normal armature, the hind pair as long as 

 tibiae. Costal thorn short; veins 3 and 4 subparallel apically. Length, 5 mm. 



Type. — d^ ; top of Las Vegas Range, above Beulah, New Mex- 

 ico, June 28, 1902, [A. N. S. No. 6217]. 



