.1. R. MALLOCH 281 



Tijpe. — d' ; Beulah, New Alexico, top of range, June 28, 1902, 

 [A. N. S. No. 6201]. Paratypes.— 28 cT, 18 9 , topotypical; 1 cf , 

 1 9 , Tennessee Pass, Colorado, July 25, 1917, (Aldrich), [Illinois]; 

 3 9 , Grant, Colorado, July 13; 1 9 , same locality, July 19; 6 9 , 

 same locality, July 21, [all U. S. Biol. Surv.]; 1 d", 1 9, John 

 Smith Ranger Ranch, Colorado, July 3, 1913, [U. S. Biol. Surv.]; 

 1 cf , Farewell Creek, Saskatchewan, Canada, [Illinois]. 

 Pogonomyia aldrlchi sp. n. 



An intensely black species which is moi'c robust than sitnilis and 

 lacks the distinct pruinescence on the abdomen which is more or 

 less conspicuous in minor and cjuite evident in similis. The chae- 

 totaxy of the mid femora in both sexes serves to separate aldrichi 

 from the other two. Length, 5.5 to 6.5 mm. 



Type.— d'; Moscow, Idaho, May 22, 1913, (Aldrich), [Illinois]. 

 Pogonomyia latifrons sj). n. 



Female. — Similar to the other species in color. 



Differs from alpicola in having the arista more distinctly hairy, 

 and from the species with hairy arista in having a strong bristle 

 on antero-ventral surface of mid tibia as well as a much broader 

 frons, the distance from anterior ocellus to base of antennae 

 about equal to width of frons at anterior margin. The mid 

 femur has one strong bristle near base of antero-ventral surface. 

 Length, 4.5 mm. 



Type.— 9 ; Tennessee Pass, Colorado, July 24, 1917, (Aldrich), 

 [Illinois]. 



Subfamily Coenosiixae 

 The characters wliich distinguish this family from Phaoniinae 

 are very few. In fact several genera that have been at various 

 times placed in Cocnosiinae are now considered as part of Phaoni- 

 inae, leaving in the former only Schoenomyza, Coenosia, Macror- 

 chis, Allognotha, Hopologaster and Caricea of the North American 

 fauna. Dexiopsis has been recorded from North America, but I 

 consider the species so recorded docs not belong to that genus. 



ALLOGNOTHA P(jkorny 



This genus previously has not been recorded from North Amer- 

 ica. I have before me specimens of the genotype, agromyzina 

 Zettcrstedt, which differs structurally from the species before me 



TRANS. AM. ENT. SOC, XLIV. 



