AGRILUS. 75 



The head is dark blue, verging into purple in front ; the forehead is rather flattened 

 and with a triangular velvety spot ; the face has a deep channel, which has a white spot 

 just above the clypeus. The thorax has two impressions on the disc, the anterior one 

 small and shallow, the posterior one rather deeper and larger ; the punctuation is very 

 fine, the punctures not close together ; the posterior ridge is rather sharp and distinct — 

 after leaving the base it is nearly straight, directed obliquely to the side, which it joins 

 considerably beyond the middle (fig. 13 a). The elytra have the subcosta well marked ; 

 the sutural area is closely and finely punctured, with an obscure elongate greyish 

 pubescent spot before the middle, and a long stripe extending from just behind the 

 middle to the apex (fig. 13 5); the subcosta is sparingly, the sides more closely punc- 

 tured ; the purple colour at the apex does not quite reach the suture. The sides of 

 the metasternum, the metathoracic epimera, and the posterior coxse are covered with 

 deep yellow pubescence. 



35. Agrilus angustus. 



Stenogaster angustus, Chevr. Col. Mex. Cent. ii. fasc. 6. no. 137 (1835) \ 

 Agrilus propinguus, Chevr. Silbermann's Rev. Ent. v. p. 95 (1837) 2 . 

 Agrilus multinotatus, Lap. & Gory, Mon. ii. p. 62, t. 14. f. 81 (1841) 3 . 



Hab. Mexico 2 , Cordova, Orizaba, Playa Vicente (Salle), Vera Cruz 3 , Alvarado 1 ; 

 Guatemala, Chacoj in Vera Paz (Champion). 



After a careful comparison of the type-specimens of A. angustus and A. propinquus, 

 now in the British-Museum collection, I have come to the conclusion that they are 

 the sexes of one and the same species. A. angustus is smaller and narrower than 

 A. propinguus, and has the front of the head flatter, more distinctly punctured, and 

 brassy in colour. 



36. Agrilus strigifrons. (Tab. IV. figg. 19, 19 a-c.) 



Angustus, nitidus, virescenti-cyaneus, supra virescens ; capite antice sat profunde canaliculato, vertice strigoso ; 



thorace brevi, transversim striolato, disco bi-impresso ; elytris griseo-maeulatis, ad apicem purpureis, 



spinulosis. 

 Long. 5 lin. 



Hob. Mexico, Tuxtla (Salle). 



The head has the channel in front deep and occupying about one third the width 

 between the eyes — it is continued posteriorly by an impressed line; the surface on 

 each side of the channel has numerous distinct punctures ; the upper part of the fore- 

 head and the vertex are marked with closely placed, curved, strongly marked striolaB. 

 The thorax has the discoidal impressions well marked — the anterior one is somewhat 

 triangular in outline, the posterior one oval ; the posterior ridge is distinct, curved 

 outwards and downwards to the lateral margin. The elytra have the subcosta well 

 marked, but obtuse ; the surface in the sutural area is densely and finely punctured, 



L2 



