141 
Group Colobotheina. 
Genus Eutrypanus (Dej. Cat.), Thomson. 
Thomson, Classif. des Cerambyc. p. 13. 
Char, emend. Body oblong or subelongate, above somewhat 
plane. Thorax with stout lateral spines or tubercles placed near 
the middle of the sides, above tubercled or convex. Elytra 
much broader than the thorax, their deflexed sides broad and 
vertical, and separated from the dorsal surface by a sharp keel 
proceeding from the shoulder ; surface furnished with setse, 
apices truncated. Prosternum narrow; mesosternum broad, 
nearly square. Terminal abdominal segment in the males more 
or less notched at the tip. Ovipositor of the females short, pro- 
jecting but slightly beyond the tips of the elytra, and subconical 
in form. Legs stout; thighs strongly clavate; fore and middle 
tarsi of the males slightly dilated ; basal joint of posterior tarsi 
longer than the two following taken togethei*. 
The species selected by M. Thomson as the type of this genus 
is the E. nitidus of White (Cat. Long. Col. Brit. Mus. p. 371, 
pi. 9. fig. 4), which he has redescribed in the ^Classification des 
Cerambycides ^ under the name of E. Venezuelensu. A con- 
siderable number of species will be found to associate with E. 
nitidus, the principal generic feature of which (omitted in M. 
Thomson's definition) is the sharp lateral keels proceeding from 
the shoulders of the elytra. This distinguishes the Eutrypani 
well from Xylergates, to which some of the species (e. g. E, 
ellipticus of Germar) are otherwise closely related. There is not, 
however, any positive character whereby to distinguish Eutry- 
panus from Colobothea; for some species, by their elongated 
shapes, might almost be mistaken for Colobothe(B, and the aber- 
rant forms of the latter genus have lateral thoracic tubercles and 
fore tarsi in the males not differing from those of the inter- 
mediate legs, as in the Eutrypani. The best distinguishing 
character is probably this : — in Eutrypanus the lateral outlines 
of the head and thorax are not continuous, and therefore the 
sordide fulvo-ciuereum. Antennae robustae, breviusculae, cinereae, arti- 
culis apice fuliginosis. Thorax supra inaequalis, trituberculatus, fulvo- 
cinereus, disco plaga obscura brunnea, tuberculis lateralibus magnis 
acutis. Elytra oblonga, postice ( d ? ) rotundato-attenuata, breviter 
oblique truncata, supra punctata, utrinque quadricostata, costis ante 
apiceni abbreviatis, tubercula nigra hispida gerentibus ; fulvo-cinerea, 
plaga indistincta scutellari alterisque duabus apud medium lateralibus 
angulatis sericeo-brunneis. Corpus subtus fulvo-cinereum. Pedes 
cinerei, fusco annulati. Maris pectore nudo, segmento ultimo abdo- 
minali fortiter inciso, tarsis anticis intermediisque dilatatis, nee ciliatis. 
Eoeminaj stylo modice elongato, segmento ultimo dorsali subacuto. 
Hab. in Brasilia meridionali. 
