NO. 2024. FLIES IN SUBFAMILY BOTANOBIINyE—MALLOCH. 259 



23. HIPPELATES DORSALIS Loew. 



Figs. 33, 34. 

 Hip pelates dor sails Loew, Dipt. Amer. Sept. Ind. Cent., 8, 1869, species 75. 



Female. — Yellow, siibshining; ocellar spot, upper surface of third 

 antennal joint and back of head blackened. Mesonotum with thi-ee 

 broad subopaque black stripes, the side ones shortened slightly, the 

 middle one very narrowly divided by a yellow line, and, usually, two 

 elongate spots in front of wing bases ; pleurae with generally the lower 

 half of meso- and sternopleurse black; scutellum black at base. Ab- 

 domen with the anterior half of segments occupied by a black, pos- 

 teriorly tridentate band. Legs yellow, rarely with the hind tibiae 

 and apices of tarsi brownish. Halteres yellow. Wings clear, veins 

 yellow. Hairs yellow, bristles black. 



Frons occupying a little more than one-third the width of head; 

 triangle Hi-defined, not shining; occupying more than two-thirds the 

 width of vertex and very short, not extending to middle of frons; 

 surface hairs weak; antennae small, third joint rounded, pilose; arista 

 tapering, almost bare, not as long as width of frons; cheeks higher 

 at anterior than at posterior margin, and at lowest part at least as 

 high as width of third antennal joint, projectmg at anterior margin; 

 proboscis glossy brown, rather long, geniculated, apical portion al- 

 most as long as subapical; eyes almost round. Mesonotum impunc- 

 tate, rather thickly covered with short, pale haii-s; scutellum 

 rounded in outline, slightly convex, disk with short hairs, apical 

 bristles stronger than the subapical pair, not closely approximated. 

 Legs normal; hind tibial spur as in impressus. Wings with venation 

 as in impressus. 



Length, 1.5-2 mm. 



Originally described from Cuba by Loew. Specimens in U. S. 

 National ]\Iuseum collection are from Biscayne Bay, Florida (Mrs, 

 A. T. Slosson). 



Becker had not seen this species and placed it in his table among 

 the species with the disk of mesonotum black or gray. Thus it is 

 impossible to place it by the use of his table. 



24. HIPPELATES STRAMINEUS Loew. 



Figs. 19, 25, 32. 



Eippelates stramineus Loew, Dipt. Amer. Sept. Ind. Cent., 10, 1872, species 90. 

 Oscini-s ovalis Adams, Ent. News, 1905, p. 110. 



Female. — Pale yellow, subopaque. Ocellar spot, upper side of 

 third antennal joint, and a spot on back of head black. Mesonotum 

 with three reddish-yellow stripes, the middle one of which is divided, 

 the side stripes are shortened in front and posteriorly, the middle one 

 reaches the anterior margin but is much shorter posteriorly than the 



