114 C. H. TYLER TOWNSEND. 



aud second segments witb a lateral and a median marginal pair of macrocbsetic. 

 third with eight or ten marginal, anal with as many marginal macrochsetse. 

 Legs black, femora and tibiae bristly and more or less silvery on the outside; 

 pulvilli rather elongate, smoky white. Wings grayish hyaline, bind cross-vein 

 nearly straight, very oblique, almost parallel with hind margin of wing; tegulse 

 white, balteres fuscous. Length of body 6i mm. ; of wing 5 mm. 



Described from one specimen ; Las Cruces, N. Mex., June 3d. 



l*lagil>ro»«|>lierysa fl4»ri«lensi!!i n. sp. % . — Differs from the preceding 

 species only as follows: Frontal vitta a little broader, more than one-third width 

 of front, vertical and next three pairs of frontal bristles strongest, directed 

 backward ; second antennal joint a little more elongate, third joint about three 

 times as long as second and slightly swollen toward tip; scutellum with no 

 brownish yellow on apical portion ; hind cross-vein subsinnate or crooked, only 

 a little oblique, much less than in F. valida. Length of body 6 mm. ; of wing 

 4.5 mm. 



Described from one specimen; So. Florida (Chas. Robertson). 



OLEXOCH^TA n. gen. 

 Moderately small, shining black species, with abdomen more or 

 less cinereous. Belongs in Phoroceratime. Head irregular in pro- 

 file, somewhat quadrilateral ; front hardly prominent, fully two-fifths 

 width of head (in 9 ). broader before than at vertex, face slightly 

 wider, about one-half width of head ; frontal bristles in two rows, 

 descending well below base of third antennal joint, outer rows di- 

 rected more or less backward, inner ones inward and decussate; no 

 orbital bristles ( 9 ). Face considerably receding, epistoma hardly 

 prominent ; facial depression about three-fifths width of face, wider 

 below, moderately deep, with a median carina ; facial ridges bristly 

 more than half way up, constricted a little below ; sides of face 

 moderately wide, bare ; cheeks fully one-fourth eye-hight, hairy pos- 

 teriorly with row of bristles on lower border; vibrissie moderately 

 stout, not decussate, inserted almost on oral margin. Eyes bare, 

 extending fully four-fifths as low as oral margin. Antennse shorter 

 than face, inserted above line drawn through middle of eyes, second 



joint rather short, third three or four times as long as second, some- 

 what convex on front edge, posterior apical corner rounded ; arista 

 short, nearly bare, thickened about three-fourths of its length, 3- 



jointed and very geniculate, second joint strongly elongate, about 

 as long as thickened portion of last joint. Proboscis shorter than 

 hight of head, not stout, labella well developed ; palpi slender, 

 thickened at tip, curved. Thorax not wider than head ; scutellum 

 with an apical pair of macrochjette reaching about to base of third 



