DISTICHONA.—CNEPHALIA. 45 
apical joint. The eyes of some male specimens very densely, in others more thinly, but always con- 
spicuously, pilose; in the female this pilosity seems to be absent. Proboscis black; palpi not thicker 
towards the tip. Thorax with four rather broad black stripes over the whole length of the dorsum, these 
becoming somewhat diffuse towards the hind margin; scutellum with a brown reflection. Abdomen with 
dark brown reflecting spots on the hind margins of the segments; anal segment usually of the cinereous 
ground-colour of the preceding segments, sometimes more reddish; anus usually rufous. Legs black or 
somewhat piceous ; middle tibie outwardly with three long macrochetw; hind tibie outwardly with a 
row of shorter and some longer bristles; foot-claws and pulvilli elongate, the pulvilli obscure. Tegule 
whitish. Wings greyish-hyaline; small cross-vein on the middle of the discal cell; apical cross-vein a 
little concave ; posterior cross-vein nearly straight, oblique, a little beyond the middle between the small 
’ 
cross-vein and the curvation of the fourth vein. 
Hab. Mexico, Chilpancingo, Xucumanatlan and Omilteme, in Guerrero 4600 to 
7000 feet, Cuernavaca in Morelos (H. H. Smith). 
Several specimens of both sexes; one of the males is much smaller in size than the 
others (5°5 millim.). 
This species bears a striking resemblance to Baumhaueria in its general facies, and 
also has a thick arista and bristles on the facial ridges, &c.; but owing to its hairy 
eyes it cannot be admitted in that genus. In some of the specimens the apical ¢ wn 
is closed and shortly petiolated. MELOY ll. LAOTS Wo RES V3, - 
The genus Acroglossa, Williston (in Soudder’s «Butterflies of 1 the Eastern United 
States and Canada,’ p. 1916), seems to be allied to Distichona, as it also has a distinctly 
jointed arista and a row of bristles on the facial ridges; but it differs in having bristles 
on the sides of the face. 
CNEPHALIA. 
Cnephalia, Rondani, Dipterol. Ital. Prodromus, ii. p. 39 (1859). 
The type of this genus is Tachina hebes, Fall., of Kurope, an insect also occurring in 
Mexico; three undescribed species from Central America must be included in the 
same genus. ‘These four species may be distinguished as follows :-— 
l. Frontal band blackish; cheeks with black hairs; thoracic 
dorsum with four black stripes. . . . . 2. 
Frontal band rufous; cheeks without black hairs ; thorax only 
anteriorly with black lines . . 3. 
2. Scutellum (at least towards its hind margin) and sides of ‘the 
abdomen testaceous orrufous . ... . . . . ~- + Aebes, Meig. 
Scutellum greyish; abdomen without testaceous or rufous 
coloration (except the anus). . .. . » 2 + 6 « onusta, v. d. Wulp. 
3. Abdomen blackish with yellowish-cinereous reflections . . » obesula, v. d. Wulp. 
Abdomen ochraceous with brownish reflections . . . . . ochriventris, vy. d. Wulp. 
1. Cnephalia hebes. 
Tachina hebes, Fall. Monogr. Musc. Suecie, ii. p. 19. 
Gonia hebes, Meigen, System. Beschr. europ. zweifliigl. Ins. v. p. 7. 11. 
