AMERICAN COLKOPTERA. 395 



fourth, joints 5-7 short, scarcely widened toward the chib, latter ovoidal. Head 

 concave between the eyes, orbital margin elevated, a curved, acutely elevated 

 ridge between the eyes, fwrming the anterior niargin of a wide transverse sulcus, 

 the posterior margin of which is ill-defined ; prothorax nearly twice as wide than 

 long, broadly constricted at the apex, regularly rounded on the sides and nar- 

 rowed from the base ; dorsal channel wide, sui)erficial, evanescent anteriorly, disc 

 densely and very finely punctured except along the base, where the punctures 

 become larger, each ])uncture bearing a coarse piliforni scale, lateral tubercles 

 rather acute, distinct, a spot of pale scales in front of each tubercle, another less 

 distinct spot each side of middle and on a transverse line with the lateral spots. 

 Elytra one-third wider at the base than the prothorax, scarcely longer than wide, 

 narrower from the humeral callus posteriorly, strife deep, punctured, punctures 

 concealed by the scaly vestiture. interspaces convex, alternately wider; femora 

 feebly clavate, tibise stout, widened from base to apex, posterior with a triangular 

 tooth one-third above the apex, tai-si less stout, fourth joint about as long as the 

 two i)recediug joints together; pygidium rather coarsely but not densely punc- 

 tured. Length 3.75 mm. ; 0.15 inch. 



% . First and second ventral segments broadly im])ressed at the middle and 

 posterior til)ife unguiculate at the apex. 



Hub. — California, Dr. Horn and Mr, Ulke's collection. 



Six specimens, all males, are Ix'tbre me. A s})ecinien bearing tiie 

 lal)(l " ('. cnrti(-'< in Dr. Horn's coll." has served as the type for die 

 al)()ve des('rij)ti()n. Readily recognized by the transverse frontal 

 sulcus in which it agrees with tlu; next species, and from which it 

 diHers in its larger size and absence of the strong macro of the 

 middU' tibite. A s})ecimen in Mr. Ulke's coll. has the frontal sulcus 

 almost ob.solete. 



A. fro lit ill Ik n. sj). PI. xii, figs. 6. 6«. — Agrees in form and scaly vestiture 

 with the i)receding sjjecies, but is smaller. The transverse frontal groove is wide 

 and well marked ; the tibiie are more slender, middle and posterior more deeply 

 emarginate above the apex and the inner apical angle of the former prolonged 

 into a stout mucro. Length 2.75 mm. ; 0.11 inch. 



■J) . Same as in californican. except tlie dilTerence in ai)ical armature of middle 

 tibiie. 



HdhJ (probal)ly California) 



A male s])ecinien witiiout locality label in Dr. Horn's coll. I am 

 not at all certain that the characters adduced in diiierentiating this 

 from the preceding species, are constant ; more extensive series of 

 specimens are required to settle this point. 



A^ griiiieus n. sp. PI. xii. fig 7. — Robust, oval, black, clothed with ashy gray 

 scales, which are larger and more dense on the underside, smaller and less crowded 

 above, especially on the elytra. Beak rather long and stout, subcarinate, slightly 

 tapering and sparsely scaly from the middle, basal half densely scaly ; antennse 

 slender, inserted two-fifths from the apex ( % ), first joint of funicle scarcely lon- 

 ger than the second. a little stouter, joints 3-4 equal, a little longer than the outer 



TRANS. AM. ENT. SOC. XXIII. NOVEMBEK. 1H96. 



