J. R. MALLOCH 309 



Hylemyia substriatella sp. u. 



Male. — Similar to the preceding species in color. The type specimen has 

 the second antennal joint rufous and the palpi black. The cross-veins are 

 very slightly clouded. 



Structurally the species are similar but the mid tibiae have an antero- 

 ventral bristle which is much stronger than that of the preceding species; the 

 hind tibia has two antero-vcntrals, and the hypopygium differs as shown in 

 figure 3. Length, 8.75 mm. 



Type. — cf ; Falls Church, Virginia, October, [Coll. Illinois]. 

 This species is added to facilitate comparison. 



Hylemyia sp.? 



Three female specimens of a species somewhat resem})ling 

 duplicata, but differing in having the arista short-haired, the 

 femora browned at middle, the outer cross-vein straight and al- 

 most erect, and the tibiae with more numerous bristles. The 

 clouded cross-veins of this species separate it from most species 

 of this genus. 



Localities: Cloudcroft, New Mexico, June 1(3, 1902; Alamo- 

 gordo, New Mexico, Maj^ 5, 1902. 



Hylemyia variata Fin. 



1820. Musca variata Fallen, Dipt. Suec, ]Mu.sc., 59. 



This species occurs throughout Europe and North America, 

 even as far north as Alaska. 



Represented in this collection by two males from Berkeley 

 Hills, Alameda Count}', California, April 11 and 20, 1908; one 

 female, Redwood Cafion, Marin County, California, May 17, 

 1908, and one male, Troy, Idaho, May 31, 1908. 



Hylemyia brevitarsis sp. n. 



Male. — Black, shining; thorax rather indi.^tinctly trivittate; abdomen with 

 a broad black dorso->central stripe and poorlj- defined black posterior and 

 anterior margins to segments. Calyptra white. Halteres yellow. 



Eyes separated bj^ more than width across posterior ocelli; parafacial in 

 profile wider than width of third antennal joint; the latter less than twice as 

 long as second; arista bare; cheek one-third as high as eye and higher than width 

 of parafacial; proboscis rather slender. Thorax with long, but not dense hairs; 

 three pairs of long presutural acrostichals present; prealar about half as long 

 as the bristle l)chind it. Abdomen narrow, parallel-sided; fifth sternite shin- 

 ing, the processes broad, rounded at apices, almost bare on lower half, and 

 with manj' long bristles on upper half. Mid femur with short bristly hairs on 

 antoro-ventr;d surface, those on postero-^-entral very long and strong; hind 



TRAXS. AM. ENT. SOC, XI.IV. 



