THE CANADIAN ENTOMOLOGIST 127 



Arista short-haired above and below; lateral facial hairs weak; ocellar 

 and postvertical bristles strong. Thorax with 3 pairs of strong dorsocentrals 

 and very strong acrostichals, of which two pairs are proximad of the anterior 

 pair of dorsocentrals. Abdomen in male stout; eighth tergite with two curved 

 downwardly projecting processes at apex of each lateral extension, one of them 

 with numerous microscopic black points on apical half. Hind femora with or 

 without a weak preapical antero- ventral bristle; hind tibia in male normal. 



Length 3.75-4.25 mm. 



Type. — Male and two male paratypes, White Heath, 111., July 11, 1915, 

 (J. R. Malloch). Allotype, and one male and two female paratypes. Summer, 

 111., August 2, 1914, (C. A. Hart). Paratypes, one female, St. Joseph, 111.. 

 June 27, 1915; one male, Dubois, 111., August 8, 1917, (J. R. Malloch); one 

 male, Urbana, 111.. September 15, 1891, (J. Marten); two females, Plummer's 

 Island, Md.. June 28, 1914, and September 13, 1914; (W. L. McAtee). 



Type in collection of Illinois Natural History Survey. 



Sapromyza (Sapromyzosoma) citreifrons, sp. n. 



Male. — Pale yellowish testaceous, almost stramineous, the frons. and at 

 times the entire head lemon yellow. Wings marked as in fuscibasis, but the 

 spot at apex of second vein is almost indistinguishable, and the base of third 

 vein is pale. Bristles on dorsum of head, thorax, and abdomen brown, the 

 hairs and bristles on sides of head and thorax and on legs yellow. 



Head very large, the frons slightly swollen, parafacial in profile wider than 

 third antennal segment; arista with short hairs; cheek about half as high as 

 eye, the marginal hairs long, curled. Thorax with 4 pairs of dorsocentrals 

 which decrease very much in size anteriorly; acrostichals small but distinct, 

 about 6 pairs, not carried proximad of the anterior dorsocentrals. Abdomen 

 short, constricted at apex, when the hypopygium is concealed the basal portion, 

 eighth tergite, appears spherical; lateral extension of eighth tergite with a short, 

 broad, apically rounded terminal process. Bristles on fore co.xae and postero- 

 ventral surface of fore femora remarkably long and slender; mid femur with a 

 Very long .slender bristle at base on ventral surface; hind tibia normal. 



Length 2.5-3 mm. 



Type. — Savanna, 111., June 13, 1917. Paratypes, Cobden, 111., May 9, 

 1918, (J. R. Malloch). Five males. 



Sapromyza occidentalis, sp. n. 



Male and Female. — Similar to fraterfia Loew and notala Fallen in colour, 

 the entire bod>- being yellowish testaceous including the legs, and each wing 

 with 7 brown spots. 



Differs from the above two species in having the thorax with 4 pairs of 

 dorsocentral bristles, the acrostichals much weaker and regular in size, and the 

 hind femur without a preapical antero-ventral bristle. The hypopygium of the 

 male differs in structure from that oi fraierna. 



Length 3.5-4 mm. 



Type. — Male, and allotype and five male paratopes, Pasadena, Cal.. (coll. 

 Aldrich). One male paratope. Laguna Beach, southern California, (Baker). 



T\pe in collection of Dr. Aldrich. 



