l8o PSYCHE [Oct.-Dec. 



12. Nemotelus trinotatus, sp. nov. 



Female. Head long, flat from the tip to the strongly declivous occiput, conical, rather 

 acute, no distinction between front and facial protuberance ; totally' black, shining, pubes- 

 cence short appressed sericeous golden, moderatelj sparse; antennae black, inserted midway 

 between eyes and tip of face ; proboscis long, black, geniculate at the middle, the basal 

 half membranous behind, the outer half curved. Thorax black with a very faint greenish 

 tinge, its pubescence like that of the head but denser laterally, humeral mark small, lateral 

 line very narrow. Abdomen black, not greenish, shining, bare, the first segment j-ellowish 

 in front, the spot broadest medially, second, third, and fourth segments each with a median 

 triangular white mark broadest posteriorly, that of the fourth segment continuous with the 

 yellow hind margin, the entire abdomen margined with a white line broadest caudally and 

 becoming attenuated toward the base of the abdomen ; venter black shining, sparsely pubes- 

 cent, immaculate but with a narrow whitish outline. The markings of the first two seg- 

 ments of abdomen sometimes obliterated. Femora black except the yellowish tip, posterior 

 tibiae blackish in the middle merging into yellow at the base and apex, tarsi light yellow. 

 Halteres white. Wings white, veins concolorous, third vein furcate at tip, fourth posterior 

 vein arising at basal third of underside of the rather large discal cell. 



Male differs from the female as follows : facial protuberance shorter and more slender, 

 front with two contiguous white spots, antennae inserted at the base of the protuberance ," 

 eyes contiguous and slightly impressed along the line of contiguity. Hairs of thora.x less 

 sericeous, sihery. Abdomen wholly white. Hind tibiae with a black spot. 



Length J* 3.5 mm.; 9 4.5 mm. 



Described from numerous .specimens of both sexes collected during May and 

 June at Austin, Texas, by Mr. C. T. Brues and the writer. The species was abun- 

 dant during the first weeks of June on the flowers of Sapindus, the " wild china- 

 berry tree." 



Profile of head of male and female figured on plate. 



13. Nemotelus flavicornis Johnson. 



Nemotelus finvicor?iis Johnson, Proc. acad. nat. sci. Phila., 1S94, p. 272. (0 

 Male. Face and vertical triangle black, shining. Facial protuberance prominent, con- 

 ical; antennae yellow. Facets of the upper half of the eye double the size of those of the 

 lower. Thorax and scutellum greenish black, shining; humeri, and a narrow line from 

 there to the base of the wings, yellow. Abdomen yellow, with a small black subtriangular 

 spot in the center of the fourth and fifth segments ; venter yellow. Legs yellow, posterior 

 femora and tibiae with a medial band of dark brown. Wings hyaline, whitish, discal cell 

 emits four veins. 



Length 2^ mm. 



Kingston, Jamaica. ^'^ 



Mr. Johnson writes that the third vein is simple. 



