392 DIPTERA. 
ANACAMPTA. 
Anacampta, Léw, Monogr. Dipt. N. Amer. iii. p. 129 (1878). 
1. Anacampta latiuscula. (Tab. X. fig. 26, wing.) [7 
Anacampta latiuscula, Low, Monogr. Dipt. N. Amer. iii. p. 130, t. 8. fig. YO’. 
Hab. Nortn America, California 1—Mextico, Mexico city (H. H. Smith). 
A single male specimen. 
OSTRACOCCELIA. 
Ostracocelia, Giglio-Tos, Bollett. dei Mus. di Zool. di Torino, viii. no. 147, p. 10 (1893). 
1. Ostracocelia mirabilis. (Tab. X. figg. 27, 27a, 3, 28, 9, wings.) 
Ostracocelia mirabilis, Gigl.-Tos, Mem. R. Accad. Sci. di Torino, ser. 2, xlv. (sep.) p. 44, fig. 137. 
Hab. Mexico, Chilpancingo and Omilteme in Guerrero, Atoyac in Vera Cruz 
(Hl. H. Smith), Tampico }. 
Two males and two females. They agree very nearly with the ample and clear 
description which Dr. Giglio-Tos has given of this interesting genus and species. 
I must observe, however, that the specimens before me are of smaller size, their 
length being no more than 7 millim., one of the females measuring barely 6 millim. 
(Giglio-Tos gives 9 millim.). Moreover, the blackish pattern at the base of the 
wings is more or less interrupted by small hyaline spots, which are not mentioned 
in the description of the author nor represented in his figure. The markings of the 
wings, however, seem to vary individually; I therefore give a figure of the wing 
from three different specimens. 
In the very striking curvature of the costa and of the second vein the genus 
Ostracocelia shows some affinity with the North-American Cemptoneura picta, Fabr., 
but it differs from that insect in having the antenne much shorter, the cross-veins not 
approximate (the small cross-vein being on the middle of the discal cell), and the 
femora somewhat incrassate. 
XANTHACRONA®, gen. nov. 
Front as broad as the eyes, short-haired ; vertex with some bristles; face excavated, slightly prominent at the 
oral margin. Antenne short, reaching to half the length of the face; third joint elliptical; arista thin, 
with hardly perceptible pubescence. Proboscis thick; palpi short. Scutellum much swollen, with two 
bristles. Abdomen as broad as the thorax; ovipositor of the female flattened, somewhat cordiform. Legs 
rather short ; femora not inerassated. Wings longer than the abdomen; first vein ending beyond the 
middle of the costa, the mediastinal cell being very large; second vein distinctly sinuous ; third and fourth 
veins nearly parallel; cross-veins approximated and oblique ; third basal cell inferiorly pointed, though 
not drawn out in a lobe. . 
* £avOds, yellow ; axpor, costa. 
