INSECUTOR INSCITI^ MENSTRUUS 73 



and on buttocks spots of anal segment. Wings quite evenly 

 smoky, a whitish oblique area extending from base of discal 

 cell to end of first vein, sometimes invading the base of fourth 

 posterior cell and most of second costal cell, often distinctly 

 tinged with yellow ; extreme base of wing yellowish, a black- 

 ish area immediately next to same. Tegulse yellowish tes- 

 taceous, matching the color of the thorax. 



Holotype, No. 19422, U. S. Nat. Mus. 



Two females, measuring 12 to 13 mm., taken with the above 

 male at Tamboraque, resemble same in the darker coloration 

 of abdomen and thorax, and are probably the females of this 

 species. The light patch of the wings is only faintly evident 

 in the female. 



Vibrissoepalpus, new genus. 



Genotype, Vibrissoepalpus flavipes Townsend, new specie^. 



Differs from Vibrissomyia as follows: Female only de- 

 scribed. Vertex one and one-fourth times eye-width. Cheeks 

 about three-fourths eye-height. Two proclinate f ronto-orbitals. 

 No ocellar bristles. Only one row of frontals. No isolated 

 facio-orbitals, but parafacials with a row of rather closely 

 set fine bristles of same strength as those of cheeks. Third 

 antennal joint hardly longer than second, straight on front 

 border, moderately widened, truncate at tip but truncation 

 very slightly oblique. Proboscis below geniculation a little 

 less than head-height. Two strong lateral scutellar bristles, 

 a long hair-like nondecussate apical pair; rest of scutellum 

 with spines, in about four irregular rows, the hindmost row sub- 

 marginal. Abdomen much wider than thorax, rounded short- 

 oval; second segment with median discal patch of spines not 

 quite so wide as scutellar patch, the anterior middle ones 

 shortest; third segment with a smaller median discal patch; 

 second and third segments with marginal row interrupted 

 opposite the discal patches, and with patch of lateral discals; 

 anal segment covered with spines except from margin. Venter 

 with bunches of spinelike macrochaetse. The macrochaetae of 

 abdomen are truly spine-like but not heavily so. Heavy long 

 spines on middle and hind femora and tibiae. Claws hardly 



