A.MKRICAX rOLKOPTERA. 19 



the last joint of the palpi is trian<iular, not longer than wide ; the eyes 

 are moderate and convex in both sexes. Antenna; one-half as long- 

 as the body, widely compressed, second joint short but distinct, third 

 elongate triangular, longer than fourth ; 4: — 10 subtriangular, outer side 

 sinuate and rounded, distal side not oblique, angle acute. Prothurax 

 with sides very widely reflexed, not thickened, apex slightly prominent 

 at the middle and feebly nicked ; disc feebly carinate near the ajiex, then 

 with a deep channel extending to the base. Scutel truncate behind. 

 Elj-tra suddenly but not widely dilated on the sides which are rounded ; 

 discoidal cost;« four, which are very feeble, except the fourth is prominent 

 and acute at the humeri ; interspaces irregularly reticulate ; suture and 

 margin scarcely elevated. 



It is a singular species leading from Li/cua to Ploteroa. 



Black, side.s of protboi'ax and the whole of the elytra bright scarlet; prothorax 

 slighth' carinate at tip, rather strongly channeled behind, sides broadly reflexed, 

 front angles rounded, hind angles acute; scnt^l black j % with sides of elytra 

 more suddenly and more l>roadly dilated; seventh ventral deejily rather squarely 

 emarginate, the side lobes of the emargination passing under the transverse 

 anterior edge; tibiae very slightly curved, angle of trochanters idiuidi'd. Length 

 10 mm. Col saiigiiiiiipcuni^ Say. 



€AL,OPTEROX Xewm. 



This genus seems to be natural, if defined by the following characters, 

 though if slight differences in the reticulation of the elytra are exaggerated 

 in importance it can douVjtless be divided into several genera, which would 

 be widely separated by that character. 



Beak wanting, front short, gibbous, mouth infiexcd ; maxillary palj*! 

 long, dilated, last jomt tji^insverse, distal side oblique. Antennae Ictng, 

 strongly compressed, joints broad, the outer ones fre(juently broader than 

 the others, second joint very short, thii'd not as long as the fourth. 

 Prothorax .strongly carinate foi- tlu' whole length, sides reflexed; scutel 

 acute, small, h^l^tra wider behind, gradually. ])iit sometimes very strongly 

 dilated, costate. and coarsely reticulate. 



Elytra with four discoidal ci.sta' 2. 



Elytra with three discoidal costa- 5. 



2. — Cost£e equally strong 3. 



Second and fourth costfe very feel >le 4. 



3. — Prothorax small, not wider than long, sides yellow; elytra sinuate <>n the 

 sides, six times wider behind than at base, reticulations quadrate, single 

 at base, becoming double behind; yellow, with a transverse band at the 

 anterior one-third, and the apical one-fourth blue-black; legs at ba.se 

 tinged with fulvous; % seventh ventral deeply emarginate, eighth parallel, 

 narrow, elongated, rounded at tip. Length 11..') — L') nnii. (Iregon. 



niegalopteroii Loc. 



