132 TRICHOPTERYGIDZA. 
differs in having six ventral segments, from the latter in the length of the elytra, and 
from both in the small size of the ninth joint of the antenne, the long and peculiarly 
formed labial palpi, the diverse form of the maxille and the short maxillary palpi, in 
the wide separation and broad lamination of the posterior cox, and in the metasternum 
not reaching the sides of the body. The single known species is from Guatemala. 
1. Pterycodes salvini. 
Pterycodes salvinit, Matth. Trans. Am. Ent. Soc. xi. p. 121°. 
Subovatus, valde convexus, nitidus, castaneus, pilis brevissimis aureis parce vestitus ; capite prominente, magno, 
lato; oculis magnis, sat prominentibus ; pronoto modico, quam caput paullum latiorie haud longiore, prope 
medium latissimo, basin versus constricto, punctis magnis foveolatis notato, interstitiis alutaceis, lateribus 
antice rotundatis, postice constrictis, latissime marginatis, margine basali leviter sinuata, angulis acutis 
prominentibus ; elytris translucidis, ovatis, quam caput atque pronotum parum longioribus, vix latioribus, 
prope media latissimis, punctis asperatis profundis remotis, ordinibus curvatis dispositis, interstitiis leviter 
alutaceis, lateribus leviter rotundatis et leviter marginatis, apicibus latis valde rotundatis ; abdomine conico, 
segmentis tribus apertis, duobus ultimis flavis ; pedibus atque antennis longis, gracilibus, lete flavis. Long. 
corp. pas lin.=0°87-1 millim. 
Head prominent, large, and broad, produced in front, alutaceous and shining, the mouth yellow; eyes large, 
rather prominent; antenne very long and slender, bright yellow. Thorax moderate, rather wider but not 
longer than the head, widest near the middle, constricted near the base; regularly marked with deep and 
rather remote foveolate punctures, with the interstices alutaceous; sides rounded in front and constricted 
near the base, very broadly margined; basal margin slightly sinuated, with the angles acute and pro- 
minent. Scutellwm moderate, triangular, marked with remote foveolate punctures. Hlytra ovate, trans- 
parent, rather longer but scarcely wider than the head and thorax, widest near the middle; marked with 
deep asperate punctures in curved rows, with the interstices alutaceous ; sides a little rounded and slightly 
margined ; apex broad and much rounded. Abdomen conic, rather acute, with three segments exposed, 
the last two segments yellow. Legs long and slender, bright yellow. Underparts castaneous, with the 
mouth, cox, and apical segment of the venter bright yellow. 
Hab. Guatema.a, Cerro Zunil 4000 to 5000 feet (Champion 1). 
TRICHOPTERYX. 
Trichopteryx, Kirby & Spence, Introd. Ent. 11. p. 90 (1826); Matthews, Trich. Illustr. p. 112, 
t. 12 (1872). 
Body oval or ovate, generally pubescent, often very convex. Head sessile, deflexed ; eyes moderate, with the 
facets few and large. Thoraa varied in form and size, with the posterior angles often much produced. 
Scutellum triangular, generally large. Hlytra truncate. Wings pedunculate, very long and narrow, 
fringed on both sides with very long sete, articulated at their base. Abdomen more or less exposed, with 
the apical segment generally dentate Antenne 11-jointed, with the two basal joints very large, the 
intermediate joints very slender, the club moniliform, generally setose. Palpt: mavillary 4-jointed, with 
the third joint the largest, and the apical joint acicular ; /abial 3-jointed, long and slender, with the apical 
joint obtusely conical. (In this and other genera of Trichopterygide the labial palpi arise from a process 
of the labium, which presents the appearance of an additional joint but is probably an integral part of the 
labium.) Prosternum moderate ; episterna rather large, trigonal; epimera large, broadly enclosing the 
coxal cavities. Mesosternum large, carinate ; episterna long and narrow ; epimera very large, extending to 
the coxal cavities; coxal cavities large, with a trochantin on the outer side of the cavity. Metasternum 
large, transverse, extending to the sides of the body, and produced posteriorly between the coxe ; episterna 
large, concealed by the elytra, with their interior basal angle alone visible ; epimera large, concealed by 
