250 PROCEEDINOS OF THE NATIONAL MUSEUM. vol.40. 



San Jose de Guaymas, Mexico, April 10 (L. O. Howard); Majiagua, 

 Nicaragua (Baker); San Marcos, Nicaragua (Baker); Tampico, 

 Mexico, December 6 (F, C. Bishopp) ; Montserrat, Ti'inidad (A. Busck) ; 

 and two specimens that agree fairly well with the description from 

 Dallas, Texas, one by E. S. Tucker, and the other by Jones and Hood. 

 Becker records it from Tifton, Georgia (Melander), but I can not 

 reconcile his description with that of Loew. He records it also from 

 Peru to Argentina in his paper on the Neartic Chloropidae (p. 172). 



10. HIPPELATES NIGRICOXA, new species. 

 Figs. 12. 14. 



Female. — Glossy black; frontal triangle glossy black, frontal stripe 

 opaque black posteriorly, orange yellow on anterior half; face and 

 cheeks yellow, the latter with a whitish bloom; antennae with basal 

 joints brown, thii'd joint broadl}^ black above, distinctly reddish 

 yellow below, at least on inner surface; proboscis brown; palpi yellow. 

 Mesonotum glossy on disk, the shining parts rarely stripe like, lateral 

 and posterior margins, as well as scutellum and upper portions 

 of pleurse Avith distinct gray pollinosity. Abdomen sometimes yel- 

 lowish at base, brownish ventrally. Legs black; fore and mid 

 trochanters, bases and apices, narrowly, of fore and mid femora, 

 rarely the apex of hind femur, bases of fore tibiae, bases and apices 

 of mid tibiae broadly, and bases of hind tibise narrowly, as well as 

 bases of posterior tarsi yellowish. Wings slightly grayish, veins 

 black-brown. Halteres yellow. Hairs and bristles black or brown. 



Frons slightly over one-third the \\'idth of head; triangle occupy- 

 ing all except a narrow space on each side at vertex, extendmg four- 

 sevenths the frons length, sides slightly convex; surface hairs dis- 

 tinct, those on margins and in center in front of triangle noticeably 

 so; antennae above normal size, but somewhat variable in this respect; 

 third joint not rounded, slightly truncate; arista barely longer than 

 width of frons, basal joints elongated, and slightly swollen, pubescence 

 loose and distinct; cheeks linear, eyes bare, distinctly higher than 

 long; proboscis not elongated, apical portion fleshy, bent back about 

 one-half the length of preceding portion. Mesonotimi with two 

 slight longitudinal depressions, occupjring the lines usually followed 

 by the lateral rows of hairs, the surface hairs rather irregularly 

 arranged, but usually 3-5 between the lateral depressions; scutellum 

 rounded m outline, the surface hairs not very numerous, but distinct, 

 marginal hairs rather longer than normally, the apical bristles not 

 approximated, cruciate. Legs covered with short pale hairs; the 

 apical spur on hijid tibia bent, situated slightly before apex of tibia 

 and not exceeding in length the diameter of tibia. Wings with the 

 third costal division one-half as long as second; veiQS 3-4 subparallel; 



