198 THE CANADIAN ENTOMOLOGIST. 



of third joint about twice the extreme basal width. Annulate portion of 

 third joint hardly as long as the basal portion, about four times as long 

 as wide. Thorax cinereous dusted, with a sparse short white pubes- 

 cence, with four somewhat indistinct wide brownish vittse. Pleura 

 whitish pollinose. Scutellum cinereous, with a yellowish tinge on 

 margin. Abdomen brownish-yellow, a well-defined, moderately broad 

 median yellowish-white pollinose vitta of even width, becoming indistinct 

 on sixth segment. A brown vitta on each side of and limiting the 

 median vitta, forming a triangle on each side on third and a subarcuate 

 marking on each side on second segment ; but these brown vittje are 

 faintly represented in full width on second and third segments by a 

 shading of brown supplementing the triangular and arcuate markings. 

 On the outside of the brown vittse on each side there is a lateral 

 yellowish-white pollinose vitta like the median one but not so distinct ; 

 while still outside of this is another lateral brown vitta limiting the 

 lateral white one on the inside and parallel with the edge of the 

 abdomen on the outside. The fourth segment has the brownish-yellow 

 considerably more tinged with brownish, and the fifth, sixth, and seventh 

 are quite brownish. Pubescence very scanty, hairs of white portions 

 whitish, of brown portions in main blackish, except on hind margins of 

 posterior segments. Legs brownish-yellow, tips of tibise and bases of 

 femora slightly brownish, but front tibiae brownish on distal half; tarsi 

 brownish, especially front tarsi, while the hind tibiie and metatarsi are 

 but little tinged with this colour. Wings fuscous-hyaline, costal cells and 

 stigma distinctly yellow. Posterior cells all wide open, no stump nor 

 even angle at the base of anterior branch of third vein. Eyes bare, no 

 ocelli. 

 .2. Tabafitis yucatanus, n. sp. 



Three 9 s. May loth. Taken from horses, at the cenote of 

 Xcolak, about ten miles southeast of Izamal, Yucatan. This is the first 

 record of a Tabanid of any genus or species, so far as I can find, from 

 Yucatan. Nor can I find any recorded from Campeche. I have 

 searched through all the multitude of existing descriptions of Tabanus 

 from North and South America, including Walker's and Bigot's numer- 

 ous species, and have been unable to identify this and the preceding 

 species with any of them. 



Length, lo to ii mm. Differs from campechianus as follows: 

 Palpi pale watery-yellowish. Gray bloom of face slightly tinged with 



