138 NEW NORTH AMERICAN ANTHOMYIIDAE (dIPTERA) 



in lucorum Fallen, punctata Stein, muUisetosn Schnabl and hrevis 



Stein is haired on the sides, and usually also on part of the ventral 



surface. 



Helina tuberculata Malloch. 



Fcnnlr.—lilack, densely brownish gray pruinescent. Thorax quaih-i- 

 vittate. Dorsum of abdomen irregularly cheekered. Bases of wing-veins 

 yellow; cross-veins narrowly iiifusealed. Calyplrae and lialt(M'es orange 

 yellow. 



Eyes separated by over one-third of the head-width; parafaeial in proiWp 

 much wider than third antennal joint and half as wide as height of cheek; 

 longest hairs on arista not longer than its basal diameter. Presutural acros- 

 tichals absent; postsutural dorso-centrals four; prealar over half as long as 

 the bristle behind it; hypopleura bare; sternopleurals 1.2. Basal abdominal 

 sternite bare. Fore tibia with a strong median posterior bristle; mid tibia 

 with two antero-dorsal and three or four postero-dorsal bristles; hind femur 

 with a few bristles at apex on both antero- and postero-ventral surfaces; 

 hind tibia with from three to five bristles on both antero-ventral and antero- 

 dorsal surfaces. Outer cross-vein cm-ved inward at middle; veins three and 

 four distinctly divergent at apices. Length, 9.5 mm. 



Locality. —lAike Louise, Alberta, Canada, July 15, 1908, 

 (Dr. C. S. Minot), [Illinois]. 



Superficially this species very closely resembles the species 

 of the lucorum, gi-oup but the arista has very nuich shorter hairs 

 and the hypopleura is l)are, while the scutellum has the sides and 

 v(nitral surface bai'c, chai-actei's which readily separate it from 

 that group. I recently descril)ed this form from the male sex, 

 but did not at thai (ime I'ccognize the female of the species. 



Helina nasoni s|). n. 



Male. — Deep black, almost glossy, with slight grayish ])ruinescence, most 

 distinct on abdomen when viewed from behind. Thorax distinctly cjuad- 

 rivittate. Abdomen usuallj' with a pair of large, elongate, i)oorly-defined 

 black .spots on seginenis two and three, the dorsum of all segments irregularly 

 checkered. Legs black. Wings slightly infuscated at bases. Calyptrae yel- 

 lowish white. Ilalteres yellow. 



Eyes si)arsely haired, separated at narrowest part of frons by a disttince 

 distin(;tly greater than width across posterior ocelli; orbits linear, not more 

 than one-third as wide as interfrontalia on upjjcr half; antennae .shorter than 

 face, third joint .slightly broadened ai)ically, at least twice as long as second; 

 arista with the longest hairs as wide as third antcnmal joint; i)arafacial in 

 profile at base of antennae about as wide as third antennal joint, slightly 

 narrowed beli)w, at its widest i)oint about half as wide as height of cheek, the 

 lattr'r with munerous marginal bristles, the upjier two or three rows nuK-h 

 shorter :iMii weaker than the lower on(>, niid distiiuliv upwardly curved 



