AMERICAN DIPTERA. 65 



TACHINID^ .S-. lat. 



36. Trichopoda arcuata Big. 



This species, which Bigot described from Chili, I believe to be a 

 synonym of T. mexicaua Mcq., so far as I can judge from the de- 

 scriptions. 



37. Tricliopoila Itistrio Walk. 



Inverness, Fla., and southern Illinois (Robertson). One specimen 

 from each locality in Mr. Robertson's collection (Robt. in litt.). I 

 use this name for T. trifasclafa Lw., A\'hich I have shown to be a 

 synonym of it (Proc. Ent. Soc. Wash., ii, 139). 



38. Triehopoda iiiexicana Mcq., Dipt. Ex., Sup. i, 172. 



jNIaccpiart described the female as there designated. The species 

 differs from all those I know by having the first two antennal joints 

 testaceous. 



39. Xysta sp. 



See "Can. Ent," 1881, p. 150, for note on Xysta sp. from New 

 Hampshire. 



40. Hyaloinyia celer u. sp. 9 . 



Eyes ciunamon-brown, closely approximated, almost touching in front of tlie 

 ocelli ; frontal vitta triangular, velvety black, with a row of black hairs on each 

 sde; a short bristle at each vertical angle, and a pair within ocelli directed 

 strongly forward ; sides of front, sides of face, face, cheeks and occiput silvery, 

 the occiput a little more inclining to plumbeous ; epistoma prominent, produced, 

 no decussate vibrissse, the facial ridges with hairs to tips of antennse ; sides of 

 face bare, cheeks with gray hair ; antennse black, third joint somewhat silvery, 

 wider than second, but little longer, rounded ; arista thickened little more than 

 half its length, 3-jointed, first two joints short; proboscis brownish or blackish, 

 longer than height of head, somewhat fleshy, labella well developed ; palpi rather 

 long, slender, knobbed at tip, blackish ; occiput sparsely black hairy. Thorax 

 and scutellum shining black, faintly silvery in some lights, humeri and pleurae 

 more distinctly silvery; scutellum with an apical and lateral pair of bristles. 

 Abdomen clothed with short black hairs, shining, black at base ; the last three 

 segments cinereous poUiuose, black punctate. Legs black, claws and pulvilli 

 somewhat elongate. Wings gray-hyaline, veins pale yellowish brown; tegulfe 

 whitish, halteres rufous. Length 4 mm. ; of wing, 3.5 mm. 



Described from one specimen. Las Cruces, N. Mex., June 18 ; on 

 flowers of Ader spinoam^. 



41. Hyalomyia celer or n. sp. % . 



Diifers from H. celer 9 only a? follows : Silvery, sides of front a little wider, 

 constricting the frontal vitta posteriorly ; epistoma not prominent, not produced ; 

 arista thickened a little less than half its length ; palpi not so much thickened at 

 tip ; hypopygium distinct, large, extruded ; claws and pulvilli rather elongate. 

 In all other respects like the preceding. Length slightly more than 4 mm. : of 

 wing aboat 3.5 mm. 



TRANS. AM. ENT. SOC. XXII. (9) MARCH, 1895. 



