168 entomological news. [May, 'o6 



a small subapical spot connected with the latter along the suture. An- 

 tenna? slender, not quite reaching the hind angles of the prothorax, joints 

 1-7 longer than wide, 8-10 as wide as long, the serration beginning with 

 the fourth joint. Head rather deeply unevenly impressed, coarsely 

 closely punctate, the punctures tending to form short strigai at some 

 points. Prothorax transverse, sides straight and parallel posteriorly, 

 feebly arcuately narrowed in front, not sinuate before the hind angles, 

 which are strongly carinate ; median line deeply broadly impressed, the 

 concavity constricted near the middle and narrowed in front ; surface 

 transversely strigose at middle, obliquely at sides ; side margin sinuous 

 when viewed laterally. Scutellum carinate. Elytra not sinuate at sides, 

 just visibly narrowed to behind the middle, thence more strongly so to 

 apex, the tips obliquely sinuato-truncate interiorly, margin acutely ser- 

 rate ; disk flattened along the suture, the depression limited externally 

 by a well-defined costa. Beneath with sparse yellowish pubescence 

 which is not condensed at sides. Prosternal lobe rather strongly emar- 

 ginate. 



Described from a single specimen given me by Mr. Beyer, 

 by whom it was taken at El Taste, Lower California. The 

 type is a $ , having the prosternum densely hairy, but with- 

 out ventral characters. The front and middle tibiae are mu- 

 cronate at tip as usual ; the hind tibise may also be armed 

 but the tips are not visible as mounted. The front and middle 

 claws are cleft at tip, the posterior with a broader more basal 

 tooth. 



Liicanus would best stand near cavatus as tabulated by Horn. 

 In general facies, and especially in the form of the elytral 

 apices it departs from the prevailing northern type and ap- 

 proaches that of the Mexican species. Dr. Horn is decidedly 

 in error in saying* that the tibiae are unarmed in the females 

 of all our species of Agrilus. In many species the tibiae in 

 this sex are armed, the spur or mucro differing from that in 

 the male only in being shorter and less conspicuous ; it is, 

 however, plain enough in the larger species, especially on the 

 middle and (when present) hind tibiae. I have not attempted 

 to verify the presence of the terminal spur throughout the 

 genus, but the following species among others well illustrate 

 the point in question. Couesii, cavatus, viitatocollis , bilineatus, 

 angelicus, arcuahis, acutipennis, walshinghami, politus, nivti- 

 ventris. 



*Trans. Am. Ent. Soc. XVIII, p. 281. 



