312 Journal New York Entomological Society. [Vol. xxii. 



behind each tcgiila, of dense pale orange hair; dense hair-band on post- 

 scutelium ochery-white, in contrast; pleura with the usual two white hair- 

 bands, the upper part not hairy between the bands ; wings strongly infuscated, 

 stigma dark ferruginous ; anterior coxa: with short stout black spines ; abdo- 

 men very distinctly but not very densely punctured ; hair-bands feeble, linear, 

 white, that bordering basin of first segment pale ochreous ; apical segment 

 6-spined, the lower apical teeth slender. 



Habitat. — Guayaquil, May-June, 19 13 (Brucs). 



Very similar to C. cdcntata Schrottky, but much smaller. It seems 

 also to resemble C. remissa Holmbg., of which the male is unknown. 

 In my table of males in Canad. Entom., June, 1912, it runs to C. sayi, 

 which is entirely different in the ornamentation of the thorax. 



Coelioxys rufibasis new species. 



Male. — Length 9 mm. ; black, with the first abdominal segment entirely, 

 the venter of abdomen, the tegulae and legs clear ferruginous ; mandibles red 

 with the apex broadly black ; face with yellowish-white hair ; antennae black ; 

 eyes with short hair; bevelled space on cheeks below covered with white hair 

 (not naked as in C. leucochrysea) ; mesothorax and scutellum shining, with 

 scattered large punctures, middle of scutellum impunctate, the margin very 

 broadly angulate ; hair of occiput pure white, but anterior band of dense hair 

 on thorax, which is widely interrupted in middle, ochrey white; two large 

 ochery-white patches of hair in scutello-niesothoracic suture; a dense patch of 

 light hair behind each tcgula ; axillar teeth rather short; wings dusky apically ; 

 anterior coxa; well spined ; abdomen almost impunctate in middle, except at base ; 

 hair-bands pure white, on third and fourth segments very broadly interrupted 

 in middle, the apical bands beyond first segment only at sides ; apical segment 

 6-dentate, lower apical teeth slender; venter sparsely punctured. 



Habitat. — Guayaquil, May-June, 1913 {Brucs). 



In my table of males in Canad. Entom., June, 1912, this runs to 

 C. sayi, which it does not resemble. It is extremely close to the 

 Brazilian C. ardcsccns Ckll., differing by the shorter, shining vertex; 

 the paler thoracic ornaments; the contrasting pale ferruginous first 

 abdominal segment; the white hair of occiput, and other small details. 

 Thus, although they look distinct enough, the technical differences 

 between ardcsccns and rufibasis are slight, suggesting the possibility 

 that they should be treated as subspecies of a single species. C. 

 rufibasis also resembles C. assumptionis Schrottky. 



Coelioxys tumorifera new species. 



Male. — Length a little over 10 mm.; black, the tegulre, legs and mandibles 

 (except at apex) ferruginous ; abdomen beneath dark ferruginous, more or 



