136 TRICHOPTERYGIDA. 
Head rather large, not much produced in front, very shining, marked with a few remote punctures; eyes large 
and very prominent; antenne rather long and very slender, pale yellow. Thorax rather large, longer and 
wider than the head, much dilated posteriorly, widest at the base, very convex and very shining; covered 
with very minute distant tubercles, the interstices smooth and very shining; sides slightly rounded and 
broadly margined; basal margin slightly arcuate, with the angles much produced and acute and paler. 
Scutellum moderate, triangular, moderately asperate. Hlytra short, much attenuated posteriorly, narrower 
and not longer than the head and thorax, widest at the shoulders, distantly and irregularly asperate ; sides 
nearly straight ; apex broad, rounded, and paler. -Abdomen very little exserted, testaceous. Legs rather 
short, bright yellow. Underparts wholly testaceous, with the metasternum dusky. 
Hab. Guatemaua, Cerro Zunil 4000 to 5000 feet (Champion 1). 
Differs from the allied species in its very shining translucent surface, pale and slender 
antenne, testaceous underparts, and in sculpture. 
5. Trichopteryx similior. 
Trichopteryx similior, Matth. Trans. Am. Ent. Soc. xi. p. 130%. 
Sat brevis, postice parum attenuata, convexa, sat nitida, capite atque pronoto nigris, elytris rufescentibus, pilis 
brevibus pallidis parce vestita ; capite magno, antice valde rotundato ; oculis magnis, haud prominentibus ; 
pronoto modico, quam caput longiore et parum latiore, ante basin latissimo, maribus magis dilatato, 
tuberculis modicis sat remotis interstitiisque nitidis fortiter reticulatis ornato, lateribus marginatis et 
rotundatis, margine basali sinuata, angulis acutis modice productis; elytris subquadratis, maribus postice 
parum attenuatis, quam caput atque pronotum parum brevioribus, haud latioribus, ordinibus remotis 
sinuatis modice asperatis, apicibus latis fere rectis ; pedibus atque antennis modicis, obscure flavis. Long. 
corp. < lin.=0-75-0°87 millim. 
16 
Head large and broad, shining, ornamented with small remote tubercles; eyes moderate, not prominent ; 
antenne moderate, dusky yellow. Thorax moderate, longer and broader than the head, widest before the 
base, more strongly dilated in the males ; ornamented with moderate and rather remote tubercles, with the 
interstices strongly reticulated and shining ; sides margined and slightly rounded ; basal margin sinuated, 
with the angles pale and moderately produced. Sceutellum large, triangular, remotely asperate. Elytra 
short, subquadrate, attenuated posteriorly in the males, rather shorter and not wider than the head and 
thorax, moderately asperate in remote wavy rows; sides slightly rounded; apex broad, nearly straight. 
Abdomen considerably exposed, with the apex tridentate and rather pointed. Legs moderate, bright 
yellow. Underparts castaneous, with the mouth and coxe yellow. 
Hab. GuatTEeMaLA, Rio Naranjo!, El Tumbador 2500 feet, El Reposo 800 feet 
(Champion). 
Differs from 7. discolor, Hald., in its smaller size, more convex form, fainter sculpture 
and less dilatation of the thorax, and more attenuated elytra. Found in numbers at 
El Reposo, rarely elsewhere. 
6. Trichopteryx crotchi. 
Trichopteryx crotchi, Matth. Ent. Monthly Mag. i. p. 248'; Trans. Am. Ent. Soc. xi. p. 130°. 
Acrotrichis crotchii, Wollast. Col. Atlant. Append. p. 15°. 
Acratrichis infuscuta (sic), Motsch. Bull. Mose. xli. part 2, p. 179 *. 
Acratrichis fulva, Motsch. loc. cit. p. 180°. 
. eqe eae . ° ° e,e . 2 ot . 
Brevis, sat lata, convexa, castaneo-brunnea, pilis pallidis vestita; capite modico, nitido; oculis modicis, promi- 
nulis; pronoto magno, valde convexo, ad basin valde dilatato, tuberculis minutissimis, ordinibus obliquis 
