CENOSOMA.—TELOTHYRIA. 167 
1. Cenosoma, signifera, sp. n., 3 2. (Tab. IV. figg. 13, ¢; 134, head in 
profile.) 
Rufous ; ocellar knob, some spots on the abdomen, and, in the male, two points on the thorax, black; wings 
with oblique brown bands. 
Length nearly 5 millim. 
Shining rufous; the abdomen paler and more transparent ; the bristles, without exception, black ; frontal band 
inconspicuous ; the black points on the thorax of the male are behind the transverse suture, in the female 
they are absent. Abdominal dorsum with black spots on the hind margins of the segments, the spots 
on the first and second segments forming in the male a transverse stripe—in the female there is no spot 
on the first segment, and that on the second is triangular ;—the second and following segments also with 
lateral spots on the hind margin; male genital parts somewhat prominent. Tegule rufous. Wings 
yellowish at the base and costa; a brown oblique band runs from the humeral cross-vein along the fifth 
vein, covering the inferior basal cells ; a second band commences at the costa in the mediastinal cell and 
runs, covering the small cross-vein, obliquely to the hind margin, where it is united with the first band ; 
a more perpendicular and broader band near the extremity of the wing, beginning at the end of the 
second vein ; apical cross-vein distinctly curved ; posterior cross-vein straight. 
Hab. Mexico, Chilpancingo in Guerrero 4600 feet, Atoyac in Vera Cruz (Hl. 
Smith). 
4 
A female from the former, a male from the latter locality. 
TELOTHYRIA, gen. nov.* 
Front rather narrow, not prominent; face perpendicular; cheeks narrow ; facial ridges without bristles ; 
vibrisse inserted at some distance above the oral margin, which is not prominent. Eyes bare, descending 
beneath the vibriss#. Antenne shorter than the face; third joint at least twice as long as the second ; 
arista bare or sometimes microscopically pubescent, not visibly jointed. Proboscis exserted ; palpi fili- 
form or slightly thickened towards the tip. Abdomen conical or ovate; first segment usually shorter 
than the second ; macrochete on the hind margins of the segments, sometimes also on the disc. Legs 
moderately long and bristly. Wings longer than the abdomen, seldom with a costal spine ; apical cell 
opened at or just before the wing’s tip; curvature of the fourth vein angular. 
This genus agrees with Mystacelia and Brachycoma in having the vibrisse inserted 
at a certain distance above the oral margin; but differs from both by the apical cell 
ending near the wing’s tip; from Mystacella, moreover, by the eyes not being hairy, and 
by a more conical and less broad shape of the abdomen. Generally, the species of 
Telothyria are of a much smaller size than those of either Mystacella or Brachycoma. 
The following Central-American species are here referred to Telothyria :— 
1. Legs wholly or for the greater part rufous . . .... . 2 
Legsblack. 2. 2. 2. 2... ra 63 
2. Abdomen with discal and marginal macrochetz (wings brownish 
at the end of the costa). . . . . 1. 2. 1. 1 1. . mubecula,v. d. Wulp. | 7 D 
Abdomen only with marginal macrochete (sometimes the 
macrochete little developed) . . 2. 2... 1 ee we 8 
3. Thorax with macrochetz and black hairs, the latter sometimes 
almost obsolete. 2. 2. 2. 2... we ee ee 
* rédos (apex), Oupis (cell). 
