230 SUPPLEMENT. 



are a little stouter. I take our specimen to be a male, by reason of the large size of 

 the abdominal lamellae. I do not distinguish the two horny points between them, but 

 instead there is a single elongate process. The black colour throughout, together 

 with the absence of yellow bands on the abdomen, will distinguish our specimen from 

 those of the male sex noticed by Osten Sacken. I believe that the Mexican species is 

 different : otherwise the individual variation must be very great. I regret my inability 

 to compare it with the description of 0. toeniatus, Bell., which may apply to the same 

 species. 



STRATIOMYIDJE (p. 22). 



XYLOMYIA. 



Subula, antea, p. 22 (nomen prseoce.) . 

 Xylomyia, Rondani, Dipt. Ital. iv. p. 11 (1861). 



2. Xylomyia pallipes. 



Subula pallipes, Loew, Centur. iii. p. 9 l ; Willist. Canad. Ent. 1885, p. 122 2 . 



Eab. North America, Connecticut 2 , Illinois 1 , Wisconsin l , Southern California 2 . — 

 Mexico, Chilpancingo in Guerrero, Teapa in Tabasco (H. H. Smith), N. Yucatan 

 ( Gaumer). 



Five specimens. The first two joints of the antennae and the base of the third are 

 yellowish-red. 



BERISMYIA. 



Berismyia, Giglio-Tos, Boll. Mus. Zool. ed Anat. Comp. Univ. Torino, vi. no. 108, p. 2 (1891) ; 

 Mem. della Reale Accad. delle Sci. di Torino, (2) xliii. p. 102 (1892). 



1. Berismyia nigrofemorata, sp. n. (Tab. IV. fig. 7, 6 .) 



c?. Eyes with abundant, long, brown or blackish pile, closely contiguous for a long distance; frontal 

 triangle and face shining black, the former with whitish dust on the sides, the latter dusted throughout, 

 though less densely so in the middle, and with longer black pile. Antennas black, the thickened basal 

 annulus of the third joint reddish-yellow; third joiut fully twice the length of the first two joints 

 together, the latter of equal length. The three-jointed palpi longer than in Bens, black; proboscis 

 brown. Thorax bluish-black, but little shining, with whitish pile along the lateral margins. Abdomen 

 bluish-black, shining. Legs black, the trochanters, knees, middle and hind metatarsi, and the larger part 

 of the second joint of the hind tarsi, light yellow. Wings brownish, a little darker anteriorly ;■ stigma 

 brown. 



$ . Pilosity of the eyes abundant, but shorter than in the male. Front of equal width on the upper two- 

 thirds ; shining black, with black pile. Pile of the mesonotum shorter and yellow. Length 5-6 millim. 



Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 



Two specimens. This species seems to agree very well in structure with B. fusca, 

 Giglio-Tos (as figured), but may be readily distinguished by the black femora. The 

 antennae are distinctly shorter and less slender, scarcely exceeding the length of the 

 head at its lower part. The genus is a valid one. 



