Sept.,i902.] COQUILLETT : NeW OrTHORRHAPHOUS DiPTERA. 141 



as long as the body, proboscis yellow, palpi black ; body greenish, base of first ab- 

 dominal segment, a rounded spot at base of third extended across the second, also 

 bases of fourth and fifth black, segments six and seven steel blue, hypopygium brown, 

 without bristles, claspers rather robust, each bearing a large lobe on the inner side be- 

 fore the tip, many white hairs on sides of first three abdominal segments, pleura 

 rather densely white pruinose, hairs of calypteres black, scutellum bearing four large 

 bristles ; coxa; greenish, apices of front ones yellow, femora blue black, the apices 

 yellow, tibia; yellow, narrow apices of the hind ones brown, tarsi brown, bases of the 

 front and middle ones yellow ; under side of femora fringed with rather long white 

 hairs and toward the apex with several black bristles ; front tibiae bearing about five 

 rather long black bristles on the inner-posterior side and with three short ones on the 

 outer side, middle tibiae bearing four rows of from two to four bristles which are rather 

 short except those on the outer-anterior and the lower ones on the inner-anterior side, 

 hind tibia; bearing about three rather short bristles on the outer-anterior side ; tarsi 

 simple, first joint of front ones bearing about five rather long bristles on the posterior- 

 under side ; wings hyaline, a brown cross-band passing over the hind cross-vein and a 

 second over the forking of the fourth vein, both bands united at their costal ends as 

 far as the third vein ; halteres yellow ; length, 6 mm. 



Habitat : San Rafael, Vera Cruz, Mexico. 

 Type: Cat. No. 6316, U. S. N. M. 

 Twenty-four males collected March 6 to April 4. 

 Sciapus longlseta, sp. nov. 



Differs, from breviseta as follows : Longest bristles on under side of second 

 antennal joint over twice as long as greatest diameter of this joint, base of third ab- 

 dominal segment with a narrow transverse spot, the sixth and seventh green, their 

 bases black, claspers not lobed, femora almost pure black, front tibiae with only three 

 bristles on the inner- posterior side, none on the outer side, hind tibiae bearing a single 

 bristle, first joint of front tarsi bearing about two bristles, last two joints of hind tarsi 

 dilated ; length, 4 mm. 



Habitat : San Rafael, Vera Cruz, Mexico. 

 Type: Cat. No. 6317, U. S. N. M. 

 Thirty-one males collected March 13 to April 4. 

 Sciapus clunalis, sp. nov. 



Differs from breviseta as follows : Longest bristles on under side of second antennal 

 joint over twice as long as greatest diameter of this joint, arista about two thirds as long 

 as the body, base of third abdominal segment narrowly black, the sixth and seventh 

 greenish with black bases, first segment of hypopygium bearing several rather long 

 bristles, the last segment considerably swollen, the claspers unusually broad, each 

 composed of two flattened oval plates, the outer one of which is attached to the inner 

 near its base, femora greenish, front tibiae bearing two rather long bristles on the inner- 

 posterior, three short ones on the outer-posterior and two on the outer- anterior side, 

 first joint of front tarsi bearing three bristles ; length, 5 mm. 



Habitat : San Rafael, Vera Cruz, Mexico. 

 Type : Cat. No. 6318, U. S. N. M. 

 A male specimen collected April i. 



