HORN EXPEDITION—CARABIDiE. 
381 
Prosopogmus insperatus, n. sp. 
Winged, elliptic-oval ; prothorax subquadrate ; elytra striate, interstices a 
little convex, a short striole at base of second interstice, basal border forming a 
slight prominence at humeral angles ; prosternum bordered on base. Piceous, 
elytra piceous-brown, legs, antennai and palpi ferruginous. 
(?. Head rather small, lightly and widely transversely impressed behind 
vertex ; front bi-impressed; eyes not prominent; orbits abruptly constricted 
behind eyes. Prothorax transverse (1'4 x 1'8 mm.) widest just behind anterior 
marginal puncture, decidedly narrowed to base, a little wider across base (PG mm.) 
than apex (P5 mm.), convex, lightly and roundly declivous to sides j anterior 
margin very lightly emarginate ; base subtruncate (lightly emarginate across 
peduncle ); anterior angles not marked; basal angles subrectangular (a little 
obtuse); lateral border narrow; median line feebly impressed; a deep narrow 
linear impression on each side of base; posterior marginal seta placed at basal 
angle. Elytra wider than prothorax, ovate (4 x 2‘5 mm.); shortly but decidedly 
narrowed to shoulders ; sides lightly rounded ; base truncate ; apical curve very 
lightly sinuate on each side; striie strongly impressed ; striole at base of second 
interstice short, linear; interstices lightly convex, lifth and seventh enclosing sixth 
—though not confluent—at apex, third tripunctate (anterior puncture on course of 
third stria, two hinder ones on course of second stria), ninth punctate ; lateral 
border narrowly reflexed ; lateral channel narrow ; basal border projecting a little 
(but not dentate) above the lateral border at humeral angles. Sides of metas¬ 
ternum and rnetasternal episterna punctulate; anterior ventral segments 
punctulate laterally. Length, 6'5 mm. ; breadth, 2‘5 mm. 
Habitat .—-Palm Creek. One specimen. 
This species would have been placed by Baron Chaudoir in his genus 
Ophryosternus., which I have merged with Prosopog/nus.* Comparing it with 
P. (Argutor) oodiformis, Mad. { = Ophryosternus sulcatulus, Chaud.) a species that 
is widely distributed in the coastal districts of Eastern Australia, the following 
differences may be noted :—(«), its much smaller size; {b), its narrower and more 
convex prothorax more strongly rounded on the anterior part of the sides and 
more narrowed behind. From P. {Siniodontus) occidentahs, Mach, it may be 
distinguished by the same differences as from P. oodiformis., and by the interstices 
of the elytra being much less convex. 
» P.L.S.N.S.W., 1S94, ix. (2), p. 428. 
