AMERICAN DIPTERA. 48 



third segments is thus confluent on each side ; the black of third segment is con- 

 fluent with black of second, and is but slightly narrowed anteriorly ; pile of 

 yellow portions of second and third segments yellow, but black in a strip anterior 

 to black borders of second to third segments ; of black portions, black ; fourth 

 segment wholly greenish black with yellowish pile, fifth black. Venter yellow 

 on each side basally. Legs blackish, basal half of all the tibias yellowish. Wings 

 hyaline, with only a small brown spot at end of auxiliary vein ; second vein ir- 

 regular, i. e., sinuous at its extremity. The autennse are light brown, but blackish 

 on upper edge. 



Fort Collins, Colorado (Gillette). One male. 



A male from Guanajuato, Mexico (A. Duges), differs almost wholly 

 in its smaller size, being only 9.5 mm. long.- It is correspondingly 

 narrower. The yellow abdominal markings do not differ to any ap- 

 preciable extent. I cannot help believing, however, that it is a 

 different species, but I prefer not to describe it from a single specimen. 



33. Voliicella Toruax Towns. 



El Torte, Baja Cal. (Cal. Acad. Sci.). One male; for description 

 see Proc. Cal. Acad. Sci., 1894. 



34. Volucella Iiaagii Jaenu. 



Guanajuato, Mex. (A. Duges). One male. Length 12 mm.; 

 length of proboscis 5 mm. ; first antennal joint brown, second and 

 third light reddish brown ; ten marginal macrochiiet?e on scutellum ; 

 first three tarsal joints light brown. Otherwise agrees with Osten 

 Sacken's description, as modified by Williston. 



Jamaica (Bowrey). One male. Length 13 mm. The shadowy 

 black borders of second and third abdominal segments, due to the 

 short black hairs, are much narrower than in the Mexican specimen, 

 that of second segment being a mere line ; stigma not so distinct, 

 probably due to age of specimen. Scutellum shows by scars to have 

 had ten marginal macrochsetse. Proboscis only 4 mm. long ; a better 

 preserved female specimen in Mr. C. B. Taylor's coll. was taken in 

 Kingston, March 10. 



35. Voluoella inops n. sp. 



Difi'ers frem T'. fax, % , as follows : A narrow line of yellow on cheeks ; front 

 wide, vertex and antennal protuberance shining black, intermediate portion 

 yellow; pleurae, thorax and scutellum with yellowish pile. Thorax shining 

 black, lateral borders, scutellum and two slightly elongate, longitudinal, pre- 

 scutellar spots, light yellow; yellow of second and third abdominal segments 

 confluent; median prolongation of black of third segment not wide, narrowed 

 anteriorly, but confluent with black of second. Black of second segment con- 

 sisting of same narrow, laterally obsolete, posterior border, the median anterior 

 prolongation of it narrow and equal in width throughout, only a little and equally 



TKANS. AM. ENT. SOC. XXII. MARCH, 1895. 



