192 SUPPLEMENT. 



Hah. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith). 



The colour varies somewhat, being either brassy, golden-green, or tinted with 

 coppery : one example has the elytra pale steel-blue. The head is rather large, and 

 has the eyes prominent. The antennae are moderately long. The thorax appears a 

 little longer than broad, some examples have the sides nearly straight, in others they 

 are gently sinuate before the base ; the surface is closely marked with oblique punctured 

 lines ; the median channel is deep, and extends from the base to the apex ; the anterior 

 margin is slightly advanced, and raised in the middle ; there is no posterior ridge. The 

 elytra are a little narrowed before the middle, and then slightly wider again, then 

 gradually narrowed towards the apex, which is obtuse ; the surface is evenly asperate, 

 without impressions, dotted with very short pale pubescence ; there is no subcosta ; the 

 suture is raised and is black, and the surface on each side of it is darker than the rest of 

 the surface. The prosternal chin-piece is emarginate. The prosternum is coarsely punc- 

 tured, acuminate posteriorly, beset with long testaceous hairs. The abdomen has the 

 lateral carina nearly rectilinear posteriorly. The basal joint of the posterior tarsi is long. 



112 (a). Agrilus opacipennis. 



Elongatus, subdepressus, niger, opacus ; antennis latis, pubescentibus ; capite antice impresso ; thorace trans- 

 versim quadrato, punctato-striolato, ruguloso, disco cyanescente, convexo, utrinque oblique impresso, 

 lateribus late pube rufo-flava marginatis ; elytris planatis, confertim subtiliter granulosis, brevissime 

 pubescentibus, subparallelis, ad apicem arcuatim atteuuatis ; abdomine segmento secundo macula pallide 

 flava ornato. 



Long. 3-3| lin. 



Hah. Mexico, Chilpancingo in Guerrero 4000 feet (H. H. Smith). 



The head in two of the examples is obscure dark green, and in the other it is more 

 purple ; closely punctate-striolate above, rugose at the lower part of the face, one 

 example having a pale yellow pubescent spot. The antennas are very broad and hairy. 

 The thorax has the disc dark blackish-blue, tinted with coppery-purple towards the 

 sides ; it is convex in front, obliquely impressed on each side behind ; the sides are 

 clothed with orange-pink pubescence, changing into yellow at the anterior angles. 



This species is close to A. auritus, Chevr., but is shorter, and has the front part of 

 the disc of the thorax raised ; in this last respect it also differs from A. gemmatus, Say. 



EX^ESTHETUS. (To precede the genus Taphrocerus, p. 127.) 



Antennal sockets small, not very approximate. The antennae a little longer than the head and thorax together, 

 hairy ; the first and second joints moderately large, the following ones slender, elongate (Tab. IX. fig. 15 a). 

 Thorax convex, transversely impressed at the base, finely margined at the sides, the anterior angles 

 deflexed and not visible from above. Scutellum elongate, arcuately acuminate (fig. 15 o). Elytra as 

 broad as the base of the thorax, subparallel, arcuately narrowed at the apex, without costae. Prosternum 

 without chin-piece : the intercoxal process subquadrate, obtusely rounded at the apex, almost truncate, 

 and met posteriorly by a slight projection of the metasternum. Metathoracic episterna moderately wide, 

 subparallel. Posterior coxae of nearly equal width throughout (fig. 15 c). Abdomen with the first and 



