MYOBIA. 138 
7. Proboscis short, palerufous . . . . .). . + + © « argenticeps, v. d. Wulp. 
Proboscis long and slender, shining black . . . . . . opima,v.d. Wulp. 
8. Third antennal joint as long as the second; abdomen cine- | 
reous, with black hind borders to the segments . . . . angulata, v. d. Wulp. 
Third antennal joint much longer than the second; abdomen 
rufous, with black dorsal spots . . . . . . . + « Y 
9. Frontal band black . . 2... . we ee ee eh) diadema, Wied. 
Frontal band rufous or inconspicuous. . . . . .» 10. 
10. Palpi exserted and reaching to considerably beyond the oral 
margin; abdomen (seen laterally) attenuated towards the 
anus ; third vein with a row of short bristles. . . . . dongipalpis, v. d. Wulp. 
Palpi not longer than usual; abdomen (seen laterally) 
convex; third vein without bristles. . . . . . . . flavipennis, Wied. 
1. Myobia flavicornis, sp. n.,3 9. (Tab. IV. figg. 1; 14, head in profile.) 
Thorax and scutellum cinereous; thoracic dorsum with four black stripes; abdomen rufous, with discal and 
marginal macrochete; antenne yellowish; proboscis, palpi, and legs rufous ; tarsi black. 
Length 7 millim. 
Front very narrow (especially in the male), cinereous, with whitish reflections; frontal band black, linear ; 
frontal bristles descending as far as the end of the second antennal joint; face and cheeks whitish-grey ; 
vibrisse inserted at some distance above the oral margin. Antenne yellowish-rufous, reaching to the 
lower third of the face ; second joint slightly prominent, with some short bristles ; third joint two or three 
times as long as the second ; arista black, pubescent, tapering towards the tip. Palpi small, cylindrical, 
sometimes infuscated at the tip. The black stripes on the thorax are very conspicuous, the outer ones the 
broadest, the intermediate ones sometimes united to a quadrangular black spot behind the transverse 
suture ; scutellum blackish at the base. Abdomen conical, yellowish-rufous, slightly transparent ; the 
front margins of the segments with pale yellow, the hind margins with brown, reflections, which, 
however, are not always conspicuous; an obsolete blackish dorsal stripe appears in most specimens ; 
macrochete long and erect—eight on the dorsum (regularly arranged, and arising from small black 
points), two, marginal, on the first segment, two discal and two marginal on the second segment, two 
discal, some lateral, and a row on the hind margin of the third segment, and a double row on the anal 
segment. Legs rufous, the tibie brownish, the tarsi black ; all the femora with some rather long bristles 
on the underside; posterior tibiee with some bristles at the middle; foot-claws and pulvilli somewhat 
elongate in the male, the pulvilli blackish. Tegule yellowish. Wings greyish-hyaline; third vein 
slightly arcuate; curvation of the fourth vein with a blunt angle; small cross-vein on the middle of the 
discal cell; apical and posterior cross-veins slightly curved. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
Several specimens of both sexes. 
2. Myobia succincta, sp.n., ¢ 9. 
Yellowish (¢) or greyish-cinereous (?); frontal band, antenne, thoracic stripes, and hind borders of the 
abdominal segments black; proboscis, palpi, and legs rufous; discal and marginal macrochete present ; 
posterior cross-vein sinuous. 
Length 6—9 millim. 
Head white; front in the male narrowed behind, in the female as broad as the eyes; frontal band scarcely 
narrower than the lateral portions ; frontal bristles on each side in a single row, descending as far as the 
end of the second antennal joint ; vibrissz at the oral margin ; eyes descending to the inferior part of the 
head; beard white. Antenne a little shorter than the face, the basal joints showing a tendency to 
