TRICHOPTERYX. 135 
capite magno, lato, oculis modicis; pronoto permagno, ad basin valde dilatato, angulis posticis latis valde 
productis, disco nitidissimo, tuberculis minutissimis remotis interstitiisque glabris nitidissimis ornato ; 
elytris brevibus, postice valde attenuatis, leviter confertim transverse asperatis, lateribus fere rectis, apicibus 
vix rotundatis; pedibus flavis; antennis longioribus, obscure flavis. Long. corp. oa lin. =1-1°12 millim. 
Head large and very broad, produced in front, very shining, almost glabrous ; eyes rather large, not prominent ; 
antenn long, slender, pitchy-testaceous. Thorax very large, very convex and shining, much dilated at 
the base, with the sides rounded and rather widely margined, a strong erect black seta on each side near 
the base; covered with very minute distant tubercles, with the interstices smooth and shining; basal 
margin nearly straight, with the angles much produced and paler. Scutellum very large and broad, lightly 
asperate. Hlytra fuscescent, short and much attenuated toward the apex, the sides nearly straight, fur- 
nished with a strong erect black seta on each side near the shoulder and another towards the apex, shorter 
and rather narrower than the head and thorax, finely and closely asperate in wavy transverse rows; apex 
broad, nearly straight, and paler. Abdomen moderately exserted, with the apex rather strongly tridentate. 
Legs moderate, robust, dark yellow. Underparis black, the mouth and the coxée piceous. 
Hab. Norta America, Washington 1.—GvatemaLa, Cerro Zunil, Balheu, Capetillo 
(Champion ). 
This species, found rather plentifully by Mr. Champion at Capetillo, is distinguished 
by its large size, short and convex form, large, very shining and remotely sculptured 
thorax, long antenne, and erect sete. Motschulsky’s description! of Acratrichis grossa, 
from Washington, agrees, as far as it goes, with this species; and I think it wiser to 
adopt this name, than perhaps erroneously to describe the Guatemalan insect as new. 
3. Trichopteryx alliberti. 
Trichopteryx alliberti, Matth. Trich. Illustr. p. 139, t. 26. f. 13°; Trans. Am. Ent. Soe. xi. p. 128%. 
Lata, convexissima, nigra, nitida, pilis brevibus griseis densius vestita ; capite atque pronoto permagnis, latis- 
simis ; pronoto seta valida nigra erecta ad latus utrumque instructo, angulis posticis valde productis ; elytris 
postice valde attenuatis, setis duabus erectis ad Jatera exteriora instructis ; pedibus atque antennis graci- 
libus, lete flavis. Long. corp. 7% lin.=1-13 millim. 
Head very large and broad; eyes not prominent ; antenne long and slender, bright yellow. Thorax very large 
and broad, very convex, with a strong, erect black seta on each side; ornamented with rather large 
tubercles in close rows, with the interstices reticulated; hinder angles much produced. lytra short, 
much attenuated posteriorly, narrower than the thorax, with two strong erect sete on the outer margins. 
Legs moderate, bright yellow. 
Hab. Guaremaua, Las Mercedes 3000 feet (Champion *).—VENEZUELA, Caracas '. 
Differs from 7’. grossa in the sculpture of the thorax. 
4. Trichopteryx lucida. 
Trichopteryx lucida, Matth. Trans. Am, Ent. Soc. xi. p. 129 *, 
Sat brevis, sat lata, postice valde attenuata, valde convexa, nitidissima, translucide castanea, pilis sat longis 
aureis vestita ; capite sat magno ; oculis magnis, valde prominentibus ; pronoto magno, postice valde dilatato, 
ad basin latissimo, tuberculis parvis remotis indistinctis interstitiisque glabris nitidissimis ornato, late- 
ribus leviter rotundatis, late marginatis, margine basali leviter arcuata, angulis acutis valde productis ; 
elytris brevibus, quam caput atque pronotum angustioribus fere pariter longis, valde attenuatis, ad humeros 
latiésimis, sat leviter irregulariter asperatis, apicibus rotundatis, sat latis ; antennis longis, gracillimis, 
pallide flavis; pedibus modicis, lete flavis. Long. corp. 7 lin. = 0°87 millim, 
