58 A REVISION OF THE NEARCTIC SCIOMYZIDAE 



Chaetomacera clara Loew (PI. I, fig- 1) 



1S(>^ Tclauoccra clara Loew, Mon. Dipt. N. Amer., i, 109. 



Dr Loew in his description of T. clara, states that the frontal 

 orbits have no black spots and that the marginal cell has some 

 small rather indistinct spots. The specimens I have placed 

 here have the marginal cell immaculate except a spot at the end 

 of the second vein, with only a suggestion, in several specimens, 

 of any other cloud or spot. The frons, usually, has brownish 

 spots at the bases of the frontal bristles and at the apex of the 

 median polished stripe. Therefore, taking into consideration the 

 length of the polished frontal orbits and the oblique position of 

 the posterior cross-vein, the probability is that I am not far 

 wrong in my determination. The series before me is certainly 

 distinct from those under valida. 



Originally described from Trenton Falls, New York. 



Specimens Examined. — 6 cf, 3 9. 



New Hampshire: Bretton Woods, June 25, (C. W. Johnson), [B. S. N. H.]. 



Massachusetts: Brookline, June 28, (C. W. Johnson), [B. S. N. H.]. 



Pennsylvania: Castle Rock, Delaware County, June 3, (C. T. Greene); 

 Glenside, Montgomery County, June 24, (C. T. Greene), [all Greene]. Hazel- 

 ton, June 29, (W. G. Dietz), [A. N. S. P.]. 



Maryland: Plummer's Island, June 17, (W. L. McAtee), [Biol. Surv.]. 



ViiKiiNiA: Dead Run, July 21, (W. L. McAtee), [Biol. Surv.]. 



Chaetomacera brevis new species 



This si)ecies may be confused with some of those of Renocera, 

 especially R. amanda, but the arista here is very short pubescent. 

 The peculiar narrowing of the frons may be an abnormal develop- 

 ment in this specimen. 



cf . Frons long as broad; orbits strongly converging, so that at the antennae 

 the frons is only one-half as broad as at the vertex; lateral shining stripe 

 absent, or rudimentary; but one frontal bristle; median shining stripe com- 

 I)lptc to margin, attenuated; frontal orbits narrowly silvery. Face, in profile, 

 straight, retreating; epistoma not prominent. Checks equal to one-third of 

 eye-height. Second antennal joint short, trapezoidal, three times long as 

 broad, not tapering, but broadly rounded apically; arista pubescent, or very 

 short plumo.se. Mesonotum with two to four narrow brown vitae. Wings 

 immaculate, with cross-veins distinctly fuscous, and longitudinal veins nar- 

 rowly and faintly clouded; stigma and costa yellow. Length. — 3 mm. 



Ti/pc.— d'; Oswego, New York, August 1, 1895, [U. 8. N. M.]. 



