26 H. C. HUCKETT 



recognized by the width of the third and fourth abdominal sterna, which 

 are nearly as long as they are broad. 



Dr. J. M. Aldrich has informed the writer that there are two distinct 

 species amongst three of the type specimens of Hylemyia planipalpis 

 Stein. Two of the types, a male and a female, agree exactly with the 

 description (Stein, 1898), and resemble H. brassicae Bouch6. The male 

 of this pair differs from the male of brassicae in having a proximal row of 

 short, uniform bristles on the posteroventral surface of the hind femur, 

 a feature which is lacking in brassicae, and in having no noticeable tuft of 

 hairs and bristles at the base of the anterior surface of the hind femur, 

 such as is conspicuously present in brassicae. The female type specimen 

 differs from the female of brassicae in having the palpi conspicuously broad- 

 ened toward the apices, a variable character in a series of eleven females 

 of this species. The third type specimen, a male, resembles very closely 

 the specimen determined by Stein as florilega Zett., and contradicts the 

 description of planipalpis in having the palpi filiform and not broadened 

 at the apices, and in having the prealar bristle short, less than half the 

 length of the following bristle, as well as possessing the characters already 

 mentioned for florilega but not noted in the description of that species. 



Hylemyia planipalpis Stein is referred to here in the sense which has for 

 its support the two types (Moscow, Idaho) agreeing with the description. 

 The other type specimen (Craig's Mountain, Idaho), which disagrees 

 with the description, is referred to as synonymous with florilega Zett. 



Hylemyia fugax Meigen 



1826 Anthomyia fugax Meig. p. p. Syst. Beschr., vol. 5, p. 174. 



1838 Anthomyza striolata Zett. nee Fall. p. p. Ins. Lapp., p. 684, no. 103. 



1866 Chortophila pudica Rond. Atti Soc. Milano, vol. 9, p 173, no. 31. 



1920 Hylemyia denticauda Mall. Ohio Journ. Sci., vol. 20, p. 281. 



Localities. — 1$, Coy's Glen, Ithaca, May 23, 1922; 2 9, McLean Bogs (near Ithaca), 

 September 11, 1920; 1 9 , Ithaca, October. 4 specimens, all females. Figure 175 on Plate XVI. 



Hylemyia fugax Meig. most closely resembles H. betarum Lint. Mai- 

 loch (1920 b) states that the male of fugax is distinguished from that of 

 substriata Stein (=betarum Lint.) in having the processes of the fifth sternum 

 broader and with hardly any fine hairs along the glossy inner margin. 

 H. fugax differs also from betarum in being larger, and in the structure of 

 the genitalia, as is shown by Malloch's (1920 b) figures of denticauda. 



The females listed above are distinguished from the female of betarum 

 in possessing one or more pairs of stout, presutural, acrostical bristles, 

 in having an interrupted row of bristles on the anterior surface of the 

 middle femur, and in being of larger size. 



Hylemyia grandivillosus sp. nov. 



Male. — Blackish species, subshining. Head black; parafrontals, parafacials, and cheeks 

 silvery gray pruinose, velvety, with dark reflections; first and second antennal segments 

 slightly pruinose. Frontal vitta, when viewed from in front, with whitish pollen. Antennae 



