TRICHOPTERYX. 141 
culis parvis indistinctis remotis, interstitiis sat profunde reticulatis nitidis, ornato, angulis posterioribus 
valde productis, acutis; elytris quadratis, quam caput atque pronotum nec longioribus nec latioribus, ordi- 
nibus transversis sat leviter asperatis, lateribus fere rectis, apicibus latis, valde rotundatis, extremis 
albidis; abdomine castaneo ; pedibus atque antennis flavis. Long. corp. 3°, lin.=0°75 millim. 
Head rather large, produced in front, ornamented with small remote tubercles, with the interstices reticulate 
and shining ; eyes large and rather prominent; antennw moderate, yellow. Thorax moderate, slightly 
dilated posteriorly, widest near the base, rather longer and wider than the head, covered with small indis- 
tinct and remote tubercles, the interstices shining and reticulated; sides moderately rounded, rather 
strongly margined ; basal margin sinuated, with the angles acute and much produced. Scutellwm mode- 
rate, triangular, transversely and rather deeply asperate. Hlytra quadrate, not longer or wider than the 
head and thorax, fuscous, faintly asperate in transverse rows, with the interstices reticulate and shining ; 
apex broad and rounded, with the extreme edge white. Abdomen castaneous, rather long and obtuse. 
Legs moderate, bright yellow. Underparts castaneous, with the mouth and coxe paler. 
Hab. Guatemaua, Zapote and near the city (Champion '). 
Not uncommon. Differs from the North-American TZ. parallela, Motsch., in its 
broader and less convex form, darker colour, and more indistinct sculpture. 
16. Trichopteryx bidilatata. 
Trichopteryx bidilatata, Matth. Trans. Am. Ent. Soc. xi. p. 138". 
Oblonga, convexa, haud nitida, obscure castanea, pilis brevibus griseis dense vestita ; capite magno, lato ; oculis 
magnis, sat prominentibus ; pronoto transverso, postice haud dilatato, ad medium latiore, tuberculis mag- 
nis, ordinibus transyersis sinuatis dispositis, confertim ornato, interstitiis reticulatis, sat nitidis, margine 
posteriore fere recta, angulis vix productis; elytris oblongo-ovalibus, ad media latioribus, ordinibus trans- 
versis profunde et confertissime asperatis ; pedibus atque antennis flavis, his obscurioribus. Long. corp. 
** jin. =0°63-0°75 millim. 
Head large and broad, ornamented with tubercles in transverse rows and reticulate interstices ; eyes large and 
rather prominent; antenne moderate, dusky yellow. horaa moderate, transverse, not longer but rather 
wider than the head, widest near the middle, with the sides rounded and margined; closely covered with 
rather large tubercles in transverse wavy rows, the interstices reticulate and slightly shining ; basal margin 
nearly straight, with the angles very little produced. | Scutellum large, triangular, closely asperate. 
Elytra oblong-oval, not wider or longer than the head and thorax, widest near the middle, very closely 
asperate in transverse rows; apex broad, almost straight, with the extreme edge white. Abdomen much 
exserted, obtuse, with the posterior edge of each segment pale. Legs rather long, bright yellow. Under- 
parts black, with the cox and apex of the abdomen piceous. 
Hab. Guatemata, El Tumbador, Balheu, San Gerénimo, and Senahu (Champion 1). 
Differs from all the species of the genus except 7’. edithia in its doubly dilated 
outline; from 7. edithia in its smaller size, longer elytra, and darker antenne. 
17. Trichopteryx nigrita. 
Trichopteryx nigrita, Matth. Trans. Am. Ent. Soc. xi. p. 188°. 
Oblonga, modice convexa, haud nitida, fusco-nigra, pilis fulvis vestita ; capite modico ; oculis sat prominentibus ; 
pronoto modico, fere transverso, postice parum dilatato, tuberculis minutis, ordinibus sinuatis remotis dis- 
positis interstitiisque sat profunde reticulatis, vix nitidis, ornato, lateribus modice rotundatis, sat late 
marginatis, angulis posterioribus latis parum productis; elytris oblongis, quam caput atque pronotum 
parum longioribus haud latioribus, lateribus fere rectis, transverse asperatis, apicibus late dilutioribus et 
valde rotundatis ; pedibus atque antennis flavis, his obscurioribus. Long. corp. 7°; lin.=0-63 millim. 
