74 SERKICOKNIA. 



basal impression ; the surface is rugulose at the base. The punctuation of the meta- 

 sternum and abdomen is rather stronger. The most important difference, however, is 

 in the apex of the elytra, which is oblique on the inner side, with about six or seven 

 small teeth ; the outer angle is not produced into a strong tooth (fig. 12). 



33. Agrilus apicalis. 



Angustus, seneus, nitidus ; capite antice longitudinaliter canaliculate), viridi-aeneo purpureo-tincto : thorace 

 convexo, cupreo-vario, medio profunda canaliculate, crebre fortiter punctato et transversim subruguloso, 

 macula laterali sordide alba ornato ; elytris viridi-aeneis (ad apieem purpureis), crebre punctatis. 



Long. 5 lin. 



Hab. Mexico, Playa Vicente (Salle) ; Guatemala, Panzos in Vera Paz (Conradt). 



The head is finely and not very closely punctured on the top ; the face deeply longi- 

 tudinally channelled ; the upper part impressed and with a brown velvety spot in the 

 middle ; in the lower part of the channel there is an elongate yellowish spot ; the 

 space between the channel and the eye is very convex and shining, and not very closely 

 punctured. The thorax is strongly and rather closely punctured ; the discoidal impres- 

 sion is deep, narrowed in front, dull brown in the middle ; the posterior ridge is well 

 marked and sharp, curved outwards, and joins the margin at about the middle; there 

 is a spot of whitish pubescence in the lateral impression. The elytra have the subcosta 

 well marked ; the sutural area is closely and finely but distinctly punctured ; the rest 

 of the surface is rather more strongly punctured, the punctures distinctly separated 

 from each other ; each elytron has about six acute teeth at the apex. The prosternal 

 process is rugosely punctured and pubescent, slightly dilated behind the coxae. The 

 metasternum is densely and finely punctured in the middle and at the sides, dull ; the 

 rest of the surface is shining and strongly punctured, the punctures not very close 

 together. The metathoracic episterna are densely and finely punctured, clothed with 

 deep yellow pubescence. The abdomen is shining, finely and not very closely punctured ; 

 the basal segment more coarsely punctured at the sides, and with a stripe of dense and 

 fine punctuation on each side at some distance from the middle, united to the lateral 

 margin posteriorly by a narrow line of similar punctuation. 



The specimen from Panzos differs from the type in having the prosternum and middle 

 of the metasternum shining, without pubescence, strongly punctured, the punctures not 

 generally crowded together. It is no doubt the female of the same species. 



A. apicalis differs from A. lentulus in having the thorax sulcate in the middle. 



34. Agrilus dentifer. (Tab. V. figg. 13, 13 «, b.) 



Augustus, nitidus, subtus seneus, supra viridi-seneus, capite elytrorumque apice purpureo-cyaneis ; thorace 

 tenuiter punctulato, disco bi-impresso; elytris obsolete griseo-vittatis, singulo apice truncato, angulo 

 externo in spinam acutam producto. 



Long. 4| lin. 



Hab. Mexico (Brit. Mus.). 



