STILICOPSIS.—STAMNODERUS. 607 
importance. As the species of the Eastern tropics are, however, very imperfectly 
known, it is probable that this union may only prove temporarily valid. 
: 1. Stilicopsis brevis. (Tab. XV. fig. 23.) 
Sunius brevis, Sharp, Trans. Ent. Soc. Lond. 1876, p. 295". 
Hab. Guatemata, Champerico, San Isidro (Champion).—SovutTH AMERICA, Amazons 
valley }. 
We have received only two examples of this species; the differences they exhibit 
when compared with the type from Ega are so slight that I cannot establish a species 
on them. 
STAMNODERUS. 
Caput ante oculos prolongatum. Collo angusto, Labrum magnum, medio longiore quasi lobum productum 
anterius subrotundatum formante. Mandibule tenues, modice elongate; sinistra uni-, dextra bidentata. 
Thorax elongatus, anterius attenuatus quasi tubuliformis. Femora anteriora plus minusve dilatata. 
This curious genus is well distinguished by the form of the labrum and the peculiar 
structure of the thorax. The front tibie are slender and more or less curved. The 
tarsi have the basal joint elongate, the third joint very small, and the fourth produced 
as a membranous lobe under the terminal joint as in Sunius. 
In addition to the species of our region the genus will include the Amazonian Sunius 
insignis and a nondescript insect from Louisiana; and I anticipate, from Erichson’s 
description, that Swnius labeo will prove to be a Stamnoderus. 
1. Stamnoderus championi. (Tab. XV. fig. 24.) 
Fulvus, antennis, palpis pedibusque pallide flavis; capite prothoraceque subobsolete punctatis, hoc minus elon- 
gato et latitudine longitudinem superante. 
Long. 5 millim. 
Hab. Guatemata, Zapote, San Gerdénimo (Champion). 
~~ 
Antenne long and very slender. Head with the anterior part depressed and rather 
obsoletely punctate, the posterior portion convex, finely carinate along the middle, 
almost impunctate. Thorax very round at the sides, the anterior constricted portion 
short; finely carinate along the middle, rather obsoletely rugose-punctate. Elytra 
scarcely longer than the thorax, deeply and closely punctate. Hind body moderately 
broad, scarcely at all broader behind. The male has the terminal ventral segment 
broadly excised, and the basal joint of the hind tarsus much dilated. 
2. Stamnoderus sallezi. 
Fulvus, antennis, palpis pedibusque pallide flavis ; prothorace densissime rugoso-punctato. 
Long. 44 millim. 
Hab. Guatemata (Sallé). 
