122 SEEEICOENIA. 



140. Agrilus quadricostatus. (Tab. VII. fig. 11.) 



Elongatus, crassus, seneus (thorace elytrisque cupreis, illo medio fascescenti), griseo-pubescens ; thorace medio 



sulcato ; elytris quadricostatis. 

 Long. 5 lin. 



Hab. Mexico, Etla (Salle). 



This species differs from A. phamicopterus in being clothed above with short grey 

 pubescence, with the whole of the underside densely pubescent, except the middle of 

 the sterna and middle of the episterna. The thoracic channel is rather wider, and the 

 punctures on the disc are more separated. The elytra have the costa? more elevated, 

 smooth, and longer, giving them a striped appearance. The abdomen has the lateral 

 carina of the basal segment only slightly notched rather behind the middle ; there are 

 no distinct spots above. 



141. Agrilus subcostatus. (Tab. VII. fig. 12.) 



Viridi-cyaneus, nitidus; thorace medio sulcato, disco fere lsevi, nigro; elytris rufo-cupreis, rugosis, costis 



quatuor parum elevatis rugosis ; corpore subtus brevissime pubescenti. 

 Long. 3f lin. 



Hab. Mexico (Brit. Mus.). 



This species differs from the preceding in being much smaller ; the disc of the thorax 

 is almost smooth, the central channel deep and without pubescence. The elytra have 

 each two costse, but they are not very distinct (especially the inner one), and are 

 roughly punctured like the rest of the surface. The pubescence on the under surface 

 is short and less dense ; the inner half of the episterna is bare. 



The following species had not been investigated when my remarks on the genus were 

 written (p. 57), or are of doubtful position or locality : — 



142. Agrilus fosseicollis. 



Agrilus fosseicollis, Thomson, Typi Buprest., Append, p. 71 \ 

 Hab. Guatemala 1 . 



I am unable to locate this species. 



143. Agrilus rugosus. 



Crassus, subcylindricus, parum nitidus, seneus vel viridi-seneus, capite thoraceque plerumque cyanescentibus, 



hoc confertim fortiter punctato, medio sulcato ; elytris rufo-cupreis, rugosis, singulis bicostatis. 

 Long. 3|-4 lin. 



Hab. Mexico, Capulalpam, Parada, Oaxaca (SalM). 



Very close to A. aurilatera, but rather smaller, with more unicolorous elytra, which 

 are also more closely rugose. The thorax is a little narrowed before the posterior angles ; 



