DIPTERA. 



287 



first segment and one in the middle of the posterior segments, as also on the sides of the fifth, sixth, and 

 seventh segments. The legs are darker-coloured, the femora black. The wings darker, 

 tf . Differs from the male of B. alhopenkillatus in having the hair of the head entirely black, the yellow pile 

 on the anterior part of the mesonotum darker-coloured, and partly black in front, and the yellow pile on 

 the abdomen entirely absent. The white spots on the mesonotum are wanting ; those of the abdomen 

 are very minute, and on the sides of the posterior segments much shorter and less abundant. Length 

 6-8 millim. 



Hal. Mexico, Dos Arroyos, Venta de Zopilote, and Tierra Colorada in Guerrero 

 (H. H. Smith). 



Ten specimens. 



SPARNOPOLIUS (p. 154). 



No Central-American species were definitely referred to this genus by Osten Sacken 

 in the earlier part of this work. 



1. Sparnopolius diversus, sp. n. 



tf . Head black : vertical triangle with a tuft of black hair ; frontal triangle small, silvery ; face bare, the 

 hair of the lower margin of the cheeks black, rather abundant. Antennae black; first joint swollen, 

 more than three times the length of the second, both clothed with bushy black hair ; third joint about 

 the length of the first, slender, the basal half a little dilated ; style small, consisting of a short cylindrical 

 first joint and a bristle of about the same length. Proboscis about as long as the thorax. Thorax and 

 -ibdomen opaque black, clothed with light yellow pile, bushy on the anterior part of the mesonotum and 

 on the sides of the abdomen ; terminal segments of the latter clothed with long and abundant black 

 hair • posterior part of the mesonotum and the middle of the abdomen with long black haii. Legs black ; 

 femora with yellowish tomentum and long bristly hairs. Wings hyaline ; marginal cell dilated at the 

 extremity : first basal cell a little longer than the second. Length 6 millim. 



Hob. Mexico, Hacienda de la Irnagen in Guerrero (H. H. Smith). 

 A single specimen. The species will be at once distinguished by the black hair at 

 the tip of the abdomen. 



2. Sparnopolius Mvus. 



? Bombyliusfulvus, Wiedem. Aussereur. zweifl. Ins. i. p. 347 1 ; Loew, Neue Beitr. iii. p. 43 2 . (For 

 other synonymy see Osten Sacken's Catalogue.) 

 Hah. Noeth America \— Mexico, Hacienda de la Irnagen in Guerrero (H. H. Smith). 



A single female, taken at the same time and place with the male of the foregoing 

 scrips & It agrees in structure precisely with that specimen, as well as with Wiede- 

 mann's description of Bombyliusfulvus. On comparing it with individuals of the insect 

 usually considered to be S. fulvus, I find that the third joint of the antennae is a little 

 shorter, and more dilated at its basal end, and that the pile is fulvous; at the tip of 

 the abdomen some black hairs are visible. Is it the real B. fulvus of Wiedemann, 

 described from the female, or that sex of the preceding species % 



