THE CANADIAN ENTOMOLOGIST. 197 



two on metatarsus I., metatarsus IV, spined only at tip, anterior coxae 

 separated by nearly width of labium. Sternum once and a third longer 

 than broad, broadest between coxae I. and II. Abdomen once and a 

 half longer than broad, rounded at base, pointed behind, moderately 

 high. The epigynum shows two oval cavities, more than their diameter 

 apart, some distance in front of a posterior median indentation. The 

 male palpus is short ; the tibia has a short, sharp projection on the 

 outside ; the bulb projects beyond the base, and the upper part is much 

 smaller than the lower, showing a curved tube on the outside, and 

 terminating in a stout, straight, black stylus. 



A few specimens from Ottawa, Canada ; collected by Mr. W. H. 

 Harrington. 



DIPTERA FROM YUCATAN AND CAMPECHE.— I. 



BY C. H. TYLER TOWNSEND, FRONTERA, MEXICO. 



A few specimens of Diptera were taken in the Yucatecan region, in 

 April and May, 1896, by the writer. The present paper describes the 

 new species. More material from that interesting fauna will doubtless- 

 be secured in time, and will form the subject of future papers of this 

 series. For an account of the peculiar bio-geographical aspects of the 

 Yucatecan fauna and flora, the reader is referred to the writer's second 

 paper on the Bio-geography of the Southwestern U. S. and Mexica 

 (Trans. Texas Acad. Sci., 1897). 



TaBANIDvE. 



I. Tabaims campechianus, n. sp. 



One V  April 25th. Taken near Campeche, between that place 

 and Esperanza (State of Campeche). Seems to approach T. nigrovit- 

 tatus, McQ., according to Osten-Sacken's description. 



Length, S^/^ mm. Palpi almost white, with some white as well as 

 black hairs. Face brownish, covered with a white bloom. Front brown, 

 yellowish-gray dusted ; frontal callosity nearly square, rounded on upper 

 corners ; a smaller longitudinal callosity above it twice as long as wide, 

 and with a tendency to a linear elongation posteriorly. Callosities 

 brown. Front parallel, about one-sixth width of head, parallel portion 

 only a little more than twice as long as wide. First two joints of 

 antennre pale yellowish, second joint ending above in a sharp spur ;, 

 third joint reddish-yellowish, annulate portion black, process of base 

 angular, but not enough developed to form a right angle, greatest width 



