142 TRICHOPTERYGIDA. 
Head moderate, rather produced in front, adorned with small scattered tubercles, with the interstices reticulate ; 
eyes moderate, rather prominent ; antenne rather slender, dusky yellow. Thorax moderate, wider but 
scarcely longer than the head, slightly dilated towards the base, widest at the base; covered with small 
tubercles in rather remote wavy rows, with the interstices rather deeply reticulated and scarcely shining ; 
sides moderately rounded and rather strongly margined; the basal margin slightly sinuated, with the 
angles broad and a little produced. Scutellum large, triangular, deeply and closely asperate. Elytra 
oblong, with the sides straight, fuscous, rather longer (not wider) than the head and thorax, rather deeply 
and closely asperate in transverse rows; the apex broad, much rounded, and paler. Abdomen much 
exserted, piceous, with the apex obtusely bidentate. Legs rather slender, yellow. Underparts black, 
with the coxe and the apex of the abdomen piceous. 
Hab. GUATEMALA, near the city (Champion). 
Differs from the allied species in its small size, oblong form, and piceous apex of the 
abdomen; from 7. obscwna, Woll., it is separated by its much smaller size, more 
depressed form, and more rugose sculpture. 
18. Trichopteryx vitrea. 
Trichopteryx vitrea, Matth. Trans. Am. Ent. Soc. xi. p. 189°. 
Brevissima, lata, valde convexa et nitida, translucide castanea, pilis aureis parce vestita; capite magno, lato ; 
oculis magnis, valde prominentibus ; pronoto brevi, transverso, quam caput haud longiore, parum latiore, 
ante basin latissimo, tuberculis minutissimis indistinctis remotis interstitiisque glabris nitidissimis ornato, 
lateribus rotundatis, margine basali fere recta, angulis minime productis; elytris subquadratis, quam caput 
atque pronotum pariter longis et pariter latis, prope media latissimis, leviter sed confertim asperatis, late- 
ribus rotundatis ad apices contractis, apicibus minime rotundatis ; pedibus atque antennis sat magnis, late 
flavis. Long. corp. - lin. =0°50-0°63 millim. ’ 
Head large, rather produced in front, ornamented with very minute indistinct remote tubercles; eyes very 
large and prominent; antenne rather large, bright yellow. Thorax short, transverse, not longer but 
rather wider than the head, widest before the base; ornamented with very minute indistinct remote 
tubercles, with the interstices smooth and shining; sides rounded; basal margin nearly straight, with the 
angles very little produced. Scutellum large, triangular, glabrous. lyira short, subquadrate, not longer 
or wider than the head and thorax, widest near the middle, faintly but closely asperate ; sides rounded, 
contracted towards the apex ; apex very little rounded. Abdomen very much exserted, flavescent. Legs 
robust, bright yellow. Underparts pale castaneous, the metasternum dusky. 
Hab. Panama, Bugaba 1000 feet (Champion '). 
Found in plenty at Bugaba. 
Differs from all others of the genus in its small size, short convex and rounded form, 
shining and translucent body, and in sculpture. 
19. Trichopteryx aubei. 
Trichopteryx aubei, Matth. Trich. Illustr. p. 117, t. 24. f. 1 (1872)*; Trans. Am. Ent. Soc. xi. 
p. 140’. 
Elongate oval, moderately convex, brown, rather thickly covered with pale hair; head large, elongate, and 
much rounded in front ; eyes rather prominent ; thorax wider but not longer than the head, widest behind 
the middle, ornamented with very small tubercles in close wavy rows, with the interstices closely reticu- 
late, the sides much rounded, the basal margin straight, with the angles obtuse; elytra rather long, rather 
wider than and more than half as long again as the head and thorax, widest towards the apex, deeply 
