NORTH AMERICAN COLEOPTERA. 253 



enth longer, acute at tip. Thorax transverse, a very vague, arcuate, 

 ante-basal impressed line. Scutelluni triangular. Elytra a little 

 wider at base than the thorax, punctuation coarse and confused. 

 Prosternuni rather narrow between the coxae, dilated behind them 

 joining the epimera, the coxal cavities closed behind. First ventral 

 segment not much longer than the second, the articulation between 

 them well marked, not connate. Legs moderately long. Tibiae 

 slightly broader at apex, the outer edge with a feeble groove extend- 

 tending their entire length, limited on each side by a fine carina ; 

 middle and posterior tibiae sinuate near the apex, the sinuation 

 limited above by a tooth, below which the margin is ciliate. Poste- 

 rior tibia alone slightly arcuate and terminated by a spur. Tarsi 

 moderately long, the first joint nearly as long as the others together, 

 the last joint slender, the claws stout, divaricate and not appendicu- 

 late at base. 



This genus was described by Crotch, and placed by him in associa- 

 tion with Chiietocnema, a ])Ositi()n in which it cannot be allowed to 

 i-emain for reasons already given. 



One species is known : 



K. Xaiiti Crotch. — Oblong oval, robust, pale ochreous, upper surface darker 

 and with a slight {)urplish lustre. Auteunse longer than half the body, brown- 

 ish, darker outwardly. Head with irregular surface, coarsely cribrately puuc- 

 tured between and above the eyes. Thorax twice as wide as long, scarcely nar- 

 rower in front, sides arcuate, anterior angles acute outwardly, hind angles obtuse, 

 sides feebly arcuate, disc moderately convex, a feeble, but distinct aute-basal 

 impression, another post-apical, parallel with the margin, surface with very 

 coarse, closely placed punctures which are cribrate near the sides, basal marginal 

 line distinct, the edge slightly reflexed. Scutelluni smooth. Elytra a little 

 wider than the thorax, humeri rounded, umbone moderately prominent and 

 smooth, disc coarsely and closely punctate, punctures confused, but W'ith a vague 

 tendency to a strial arrangement, in some specimens the intervals, by their regu- 

 larity, vaguely resemble costpe. Abdomen sparsely punctate and shining at mid- 

 dle, more densely and finely punctate at the sides and finely pubescent. Femora 

 pale rufotestaceous, the tips brownish, tibise and tarsi brown. Length .24 — .20 

 inch.; (I— 6.5 mm. IMate VII, fig. 3. 



In the male the first joint of the four front tarsi is rather broadly 

 dilated, the last ventral broadly emarginate at the middle of the 

 apex. In the female the last ventral is longer and oval at tip. 



This insect has rather the facies of a Colaspis than a Halticide. 



Occurs in the peninsula of Lower California. 



