256 SUPPLEMENT. 



2 (a). Chrysops ? 



(£ . Antennae altogether black, the first joint incrassate. Facial tubercles yellow. Mesonotum dark brown, 

 with inconspicuous stripes and yellow pile. Abdomen opaque brownish-black ; second and following 

 segments each with a narrow posterior yellow border, dilated into a minute spot in the middle • second 

 segment yellow on the sides. Legs black ; base of the front tibiae, the middle tibiae and the base of the 

 middle metatarsi, the hind femora and tibiae in part, and the hind metatarsi for the greater part, red. 

 Wings with a hyaline spot in the distal end of the two basal cells, and in the anal cell ; the brown of the 

 distal costal margin scarcely exceeds the anterior branch of the third vein ; the fourth and fifth posterior 

 cells are for the most part subhyaline. Length 10 millim. 



Hal. Mexico, Mexico city \H. H. Smith). 



A single specimen. It is not impossible that this belongs to some described species 

 of which the female alone is known. 



Chrysops latifasciatus (p. 46). 



To the localities given, add : — Mexico, Jalapa (M . Trujillo). 



A single female specimen from Jalapa I refer with some doubt to this species. The 

 first joint of the antennae is somewhat swollen proximally ; the second joint is stout, 

 and only a little shorter than the first; the third joint is fully one and a half times 

 the length of the second. The abdomen has a small yellow spot on the side of the 

 first segment, a large triangular spot on the sides of the second, and three small spots 

 on the posterior margin of the latter, of which the middle is the larger ; the following 

 segments have each three small posterior spots. The first two basal cells of the wings 

 are brown for two-thirds of their length ; the broad median band reaches nearly to the 

 posterior border, with a subhyaline incision in the fifth posterior cell. 



5. Chrysops neglectus, sp. n. (Tab. IV. fig. 20, ? .) 



$ . Black. Front blackish above, across the middle yellowish-pollinose ; the large frontal tubercle brown 

 above, yellowish below. Antennae elongate ; first joint slightly thickened ; second joint about two-thirds 

 the length of the first ; third joint as long as the first two together ; first two joints and the immediate 

 base of the third yellow, the third joint for the most part black. Face reddish-yellow and almost wholly 

 shining ; palpi reddish. Thorax shining black, nearly bare ; mesonotum lightly greyish in front. 

 Abdomen black ; second, third, fourth, and fifth segments each with a small, triangular, yellow spot, 

 successively decreasing in size, on the hind margin ; first segment with a small, second with a large, 

 yellowish spot on the sides. Legs reddish-brown ; the distal half of the four posterior femora, the middle 

 tibiae, and the first two or three joints of the four posterior tarsi, reddish-yellow. Wings with a broad 

 brown band reaching the posterior margin in the fourth posterior cell and emarginate in the fifth ; the 

 brown of the costa continues narrowly to just beyond the anterior branch of the third vein ; two basal 

 cells brown at the immediate base only. Length 8| millim. 



Eab. Mexico, Teapa in Tabasco (E. H. Smith). 



One specimen. The single row of yellow spots on the abdomen distinguishes this 

 from the black species hitherto described. 



