AGEILTJS. 99 



of the basal segment alters its direction posteriorly (fig. 3 b). The whole of the sternum 

 is finely pubescent. 



Two examples, one from Yolos and the other from Parada, appear to be varieties of 

 this species ; but they differ considerably from each other and from the type. 



The example from Yolos is 4^- lines long : it differs from the type in having the 

 thorax more coarsely punctured. The specimen from Parada is 3| lines long : it 

 differs from the type in having the head obscure green, and rather more widely 

 sulcate ; the thorax golden, tinted with coppery in the middle ; the elytra decidedly 

 more obtuse at the apex, each being somewhat obtusely rounded ; and the whole of 

 the underside black. 



Three specimens from Chilpancingo (2| to 3£ lines long) differ from the type in 

 being relatively narrower, especially the smaller examples ; and they are brassy above, 

 with the elytra faintly tinted with coppery. 



Two examples, one from Panistlahuaca (Salle) and one from " Interior of Mexico, 

 Turner " (Brit. Mus.), agree fairly with the type, except that they are uniform brassy- 

 green above, and the elytra appear rather more closely rugose. 



It is not improbable that I may be here associating several closely allied species, 

 but some of the differences may be sexual. 



84. Agrilus marginatus. 



Latus, sat depressus, fere niger, parum nitidus ; capite rugoso, longitudinaliter sulcato ; thorace aureo-cupreo, 

 fortiter rugoso, lateribus nigro-purpureis ; elytris crebre asperatis, brevissime griseo-pubescentibus, 

 violaceo-nigris, ad apicem subtnincato-rotundatis, tenuiter serrulatis. 



Long. 3j lin. 



Hab. Mexico, Oaxaco (Salle). 



The longitudinal channel on the head is only moderately deep and rather wide, 

 having no abrupt limits. The thorax is coarsely rugose, with some shining wavy rugae 

 on each side of the disc ; the disc has a moderately well-marked oval impression in 

 front, and another at the base ; the lateral impression is very slight ; the posterior 

 ridge is distinct, short, slightly directed inwards. The elytra have the subcosta very 

 slightly marked. The prosternal chin-piece is distinctly emarginate. The prosternum 

 is closely and rather finely rugose ; the intercoxal process is not margined. The meta- 

 thoracic episterna are finely rugose on the outer side, but with a smoother inner 

 margin. The abdomen is moderately finely punctured, generally in wavy lines, the 

 punctures much less distinct in the middle than at the sides. The whole of the 

 underside of the insect is more or less clothed with very short fine pubescence. 



85. Agrilus bicolorellus. 



Agrilus bicolorellus, Thomson, Typi Buprest. p. 90 \ 



Hab. Mexico 1 . 



02 



