15S NEW NORTH AMERICAN ANTIIOMYIIDAE (dIPTERa) 



tVimir with four or five stronj;; bristles on apical half of antcro-ventral sur- 

 face; hind tibia with one postero-dorsal, two or three antero-dorsal and 

 two or three antcro-ventral bristles. Wings more I'ountled than in male; 

 outer cross-vein nearly straight. 



Length, 7 to 7.5 mm. 



Type. — cf; Mt. St. Piran, Alberta, Canada, no date, (H. 

 Skinner), [A.' N. S. P.]. Allotype.— 9 ; Base Station, Mt. Wash- 

 ington, New Hampshire, August 15, 1916, (C. W. Johnson). 

 Pomijf/pes.— Boisdale, Cape Breton, Nova Scotia, July 18 to 19, 

 one male; Spruce Brook, Newfoundland, August 8 to 12, two 

 males; Youghall, New Brunswick, Canady, July 4 to 7, 1908, (A. 

 Gibson), four males and two females; Mt. Washington, New Hamp- 

 shire, one male; White Mountains, New Hampshire, (Scudder), 

 one female; Fallen Leaf, Lake Tahoe, California, June 15, 1916, 

 (H. G. Dyar), one male; Kokanee Mt., British Columbia, Aug- 

 ust 10, 1903, (H. G. Dyar), one female; South Fork Creek, British 

 Columbia, August 11, 1903, (H. G. Dyar), one male; Lillooet, 

 British Columbia, September 6, 1918, one male. 



Trichopticus latipennis sj). n. 



Male -dud fcnutlr. — Similar in general color to the preceding specic^s. Fore 

 femora entirely pale, base of third antennal joint and apex of second narrowly 

 reddish, thorax and abdomen more distinctly shining than in c nfuritii.^ 

 and with grayish instead of brassy yellow pruinescence. 



Male. — Head as in conformis but the cheek has fewer and stronger marginal 

 bristles. Thorax with two pairs of very weak presutural acrostichals. Ab- 

 domen more elongate than in conformis, and less pointed at apex. Fore 

 tibia unarmed at middle; mid femur with a few strong bristles on basal half 

 of antero-ventral surface and some weak hairs on basal half of postero-ventral ; 

 mid tibia with two or three posterior bristles and a few weak postero-ventral 

 setulae; hind f(!nuu- with a series of bristles on antero-ventral surface which 

 arc shortest in middle, and a few bristles on apical third of postero-ventral 

 surface; hind tibia with one postero-dorsal and two antero-dorsal bristles, 

 the antero- and postero-ventral surfaces with long bristly hairs, which are 

 hjngest at middle. 



Feina'e. — Frons as in conJorniiK, cheek narrowcn' than in that species, but 

 little higher than width of parafacial. In otlier respects as in the male, except 

 that the hintl tibia lacks the bristly hairs. 



Length, 7 mm. 



Type. — cf ; Mt. Fquinox, \'(Miuout. Jutie 5, 1910. Allotype. — 

 9 ; Bretton Woods, New Hami)siiire, June 24, 1913. Pamtypes. — 

 North Adams, Massachusetts, June 18, 1906; Great Barrington, 

 Massachusetts, June 16, 1915; Capens, Maine, July 17, 1907. 

 All taken by C. W. Johnson. 



