140 NEW NORTH AMERICAN ANTHOMYIIDAE (dIPTERa) 



black; palpi testaceous. Legs yellowish testaceous, coxae largely fuscous, 

 fore femora with a fuscous stripe on postero-dorsal surface, tarsi black. Wings 

 dear. Calyptrae and halteres whitish yellow. 



Eyes nude, separated at narrowest part of frons by about three times 

 the width across posterior ocelli; orbits moderately wide, each about half 

 the width of interfrontalia; parafacial in profile about 1.5 as wide as third 

 anteinial joint and half as wide as height of cheek, the latter with a series of 

 bristles on margin, above which there are a few weak hairs; antennae shorter 

 than face, third joint narrow, about twice as long as second; arista with the 

 longest hairs distinctly longer than width of third antennal joint. Thorax 

 without strong presutural acrostichals, with three pairs of jiostsutural dorso- 

 contrals; prealar bristle very small; sternopleurals, three, the posterior lower 

 one much below the upper and distinctly in front of it. Abdomen sub- 

 cylindrical, tapered to apex; first sternite with bristly hairs; fifth sternite 

 with a rather deep posterior excavation, the center of it with a distinct notch. 

 Legs elongate; fore tibia with two minute antero-dorsal setulae, and two strong 

 posterior median bristles; fore tarsus distinctly longer than fore tibia; mid' 

 fenun- with a few long bristles on basal half of postero-ventral surface; mid 

 tibia with one or two antero-dorsal bristles, and a slightly irregular series 

 of four or five on postero-dorsal surface ; hind femur with three or four weak 

 bristles on basal half of postero-ventral surface and about six strong bristles 

 on ai)ical half of antero-ventral; hind tibia with from four to six long antero- 

 ventral, three strong antero-dorsal, and, near base, one or two strong jjostero- 

 dorsal bristles, a number of short setulose hairs on postero-dorsal surface, 

 and some longer setulae on middle of posterior surface. One costal thorn 

 long; outer cross-vein nearly straight; veins three and ff)ur distinctly diver- 

 gent apically. Length, S nun. 



Tijpe. — cf; Bozcman, Montana, elevation 4800 feet, July 7, 

 1902, [Illinois]. 



Helina spinilamellata s]). n. 



Male. — Hlack, densely yellowish gray pruinescent. Head black, frons 

 brownish, parafaeials and cheeks slightly velvety; second antennal joint 

 and pali)i yellowish. Dorsum of thorax with four narrow fuscous vittae; 

 humeral angles and scutellum yellowish. Abdomen with faintly indicated 

 pair(>d brown dorsal sjiots, ai)ices of segments yellowi.sh testaceous, that 

 of fourth broadlj' so. Legs yellowish testaceous, tarsi entirely, fore femora 

 largely fuscous. Cross-veins of wings infuscated. Calyptrae and halteres 

 yellow. 



Eyes bare; fnjns at vertex about one-third as wide as head, wider an- 

 teriorly; each orbit with five or six bristles and a few setulose hairs, as is usual 

 in females; ocellar bristles very long; parafacial narrower than third antennal 

 jniiil ;ind about one-third as wide as height of cheek; arista wilh its hmgest 

 hairs not as long as width of third antennal joint; vibrissae very long and 

 sining; jjroboscis stout. Presutural acrostichals ahsent; jjostsutural dorso- 

 ci'titrais, three; prc'iliir riiinutc; iiyiioplcuia l)are; stei'iiojileurals 1:2. .Vbdo- 



