AMERICAN COLEOPTERA. 21 



joint trapezoidal, broader than long. Prothorax small, strongly carinate, sides 

 strongly reflexed, obliquely converging in front, hind angles long, divergent, disc 

 dusky. Elytra with the humeri and a narrow transverse band about the middle 

 fulvous; sides gradually and moderately dilated, regularly rounded behind; sur- 

 face hairy, suture, margin and two discoidal costse strongly elevated; first and 

 second interspaces with double series of large cells which are not very transverse, 

 as in reticulatum, but quadrate. Length 6.7 mm. 



Arizona, one 9 ; kindly given me by Prof. C. V. Riley. The reticu- 

 lation of the elytra is almost as in Csenio diniiu'i'ata, but the form of body, 

 •antennae, palpi and an-angement of color are as in Calopfemn ti/pk-um. 



Calopteroii tricarinatum.— Black, above fulvous; eyes rather large, 

 convex, \y.\\\n with the last joint trapezoidal, not longer than wide. Antennae 

 very broad, two-thirds as long as the body, second joint verj'- small, third triangu- 

 lar, longer than fourth, 4 — 10 triangular, not longer than wide, outer side curved, 

 distal side oblique, angle rather acute, eleventh longer, oval, subsinuate near the 

 tip. Prothorax broader than long, narrowed in front, apex subangulate, sides 

 sinuate, broadly reflexed, hind angles divergent, acute, disc very strongly carinate. 

 Scutel triangular, slightly nicked behind. Elytra elongate, subparallel, but slightly 

 wider behind, suture, margin and three discoidal costte strongly elevated, inter- 

 spaces with large quadrate reticulations which are not more than twice as wide 

 as long. Beneath tinged with testaceous. Length 7 mm. 



Arizona, one 9 , for which I am also indebted to Prof. C. • V. Riley. 

 The form of the last joint of the palpi seems to require the reference of 

 this species to Calopteron, though the reticulation of the elytra and the 

 form of antenna? are quite different. It seems to belong to the Section A, 

 ii, of Biologia Centro-Americana, (Lycidas, p 13), in which case the % 

 antennae would be pectinate. 



C^SflA Newm. 

 Although in this genus the prothoracic spiracle is not tubular and 

 prominent, yet in all other respects it resembles so closely the preceding 

 genera, especially Culojttiron, that it cannot be naturally separated from 

 them. The front is strongly gibbous, prolonged into a very short tri- 

 angular beak ; maxillary palpi dilated, hist joint elongate, cultriform, the 

 outer margin sinuate, the inner one rounded into the tip, which is obtuse. 

 Antennae very broadly compressed, first joint broad, triangular, gecond 

 very short, third one-half as long as fourth, 4 — 10 broad, in 1 each 

 with a long basal process, in 9 with a shorter and broader medial process 

 gradually occupying the whole length of the joint, eleventh joint elongate, 

 rounded at tip. Prothorax strongly carinate, sides broadly reflexed, sinu- 

 ate, front angles round. d, hind angles acute, prolonged, apex bisinuate, 

 prominent and rounded at the middle. Scutel triangular, slightly nicked 

 behind. Elytra with four discoidal costae, first and third less elevated, 

 interspaces with double rows of coarse quadrate reticulations. 



