AGRILUS. 107 



106. Agrilus basalis. 



Agrilus basalis, Chevr. Col. Mex. Cent. ii. fasc. 6, no. 144 (1835) \ 



Hab. Mexico, Alvarado \ Cordova (Salle), Atoyac in Vera Cruz (II. H. Smith). 



All the examples of this species in the British-Museum collection as well as those 

 received from M. Salle differ from the type in having the front of the head green. 



107. Agrilus punctatissimus. 



iEneus ; capite thoraceque rufo-cupreis, creberrime punctatis ; elytris nigro-purpureis, basi obscure viridi-seneis, 



sat dense pube flavo-grisea vestitis, basi lateribusque fere usque medium calvis. 

 Long. 31 lin. 



Hab. Mexico, Cordova (Salle). 



The head is convex, with a not very deep longitudinal channel in front ; the clypeus 

 is green. The thorax is convex anteriorly, with a very shallow impression in front of 

 the middle ; the extreme anterior and posterior margins are tinted with blue ; the 

 posterior ridge is very short and indistinct, obliquely directed inwards. The elytra are 

 very densely punctured, more granular at the base ; they are considerably widened at 

 the posterior two thirds, and then narrowed to the apex, the apex of each elytron being 

 obliquely truncate inside and outside; the subcosta is very slightly marked. The 

 prosternal chin-piece is distinctly emarginate. The prosternum is closely and finely 

 punctured and slightly pubescent ; the intercoxal process is very slightly raised in the 

 middle, not margined at the sides. The metathoracic episterna are closely punctured 

 on the outer half, nearly smooth on the inner side. The abdomen is very delicately 

 punctured, the punctuation dense at the base ; the three apical segments have each 

 a whitish pubescent spot at the sides, The legs are long and slender; the basal 

 joint of the posterior tarsi is very long. 



This species so closely resembles A. basalis that I separate it with hesitation. It 

 differs in having the basal margin only of the thorax greenish-blue, whereas in 

 A. basalis the green colour extends one third the length of the thorax ; the disc has 

 a shallow impression in front, and is not longitudinally channelled as in A. basalis; and, 

 lastly, there is a slight oblique posterior ridge, which is not present in A. basalis. 



108. Agrilus dimidiatus. (Tab. VI. figg. 17, 17 a.) 



Cyaneus, sat nitidus ; capite thoraceque lsete rufo-cupreis ; elytris cyaneo-viridibus, dimidio apicali pube griseo- 

 flava sat dense vestitis, pube ad suturam scutellum versus paullo ascendente ; abdomine maculis niveis 

 ornato. 



Long. 2| lin. 



Hab. Panama, Bugaba (Champion). 



The head is convex, longitudinally striolate on the top, shining, and not very closely 

 punctured in front, with a well-marked /^shaped impression. The thorax is rather 

 short, convex in front, deeply impressed at the base, closely rugulose, the rugae curved ; 



P2 



