40 O- H. HORN, M. D. 



ber from the Pacific region now nearly equals that from the entire 

 region east of the Rocky Mountains. Several present characters bo- 

 fore unknown, which will appear in their proper places. 

 The following table contains the Pacific species only : — 



Hind tibiae male slightly arcuate, inner side flattened and obliquely grooved 



(as in the anterior tibiae of the Lamiidce) abnorniis. 



Hind tibiae similar in the sexes, slightly, or not grooved. 



Elytra in both sexes rounded at tip or very slightly more acute in the 

 male *• 



Elytra in male acutely prolonged, subcaudate 2. 



1. — Antenna; of male pectinate. Elytra % feebly impressed at tip..C!rotcliii. 



Antennae of male at most serrate II. 



3.— Elytra at tij) % slightly swollen and impressed iuoiiti<M»la. 



Elytra at tip % neither more convex nor impressed 4. 



4.__Elytra at tip % pale rufo-testaceous and smoother ». 



Elytra at tip similar in the sexes and similarly punctured 6. 



5.— Thorax red (sometimes with discal black spoil) ...ptinetiilata. 



Thorax black fiiiiebris. 



6.— Thorax black, elytra vittate and finely punctured vittata. 



Thorax red, elytra black, moderately coarsely punctured. ..incoiispicua. 

 2. — Elytra black with oblique testaceous vitta Bardii. 



Elytra entirely black «liHtiiigueiMla. 



C abiiorniis, n. sp. — Head black, sparsely punctate. Antennae black, 

 moderately serrate. Thorax transversely oval, rufous, shining, very sparingly 

 punctate. Elytra black, shining, moderately densely and coarsely punctured. 

 Body beneath black, shining, very sparsely punctate. Legs black. Length 

 .28 inch ; 7 mm. 



Jlfa/e.— Elytra at tip not differing from the remainder of the surface in color 

 and punctuation and neither impressed nor convex. Hind femora moderately 

 stout. Hind tibiae slightly arcuate, inner side slightly flattened and with an 

 oblique groove somewhat similar to that of the anterior tibiae of the Lamioid 

 Cerambycidos. Fourth ventral segment prolonged in a broad lobe at middle on 

 each side of which the margin is sinuate; fifth segment truncate at middle and 

 with a broad but feeble transverse channel in front of the hind margin, and in 

 front of this the surface is moderately convex ; sixth segment feebly promi- 

 nent. Terminal lobes of penis sheath slightly arcuate, obtuse at tip and not 

 booked on their inner margin. 



Female. — Unknown. ^ 



This species is certainly one of the most remarkable in the genus, 

 and indicates a departure of specific characteristics, in a direction 

 wholly unexpected. Superficially it resembles punctulata. The fe- 

 male is unknown and probably not distinguishable without great care 

 from that of pumtuhita. 



One specimen collected by Mr. Crotch, in California. 



