100 SEKRICOEMA. 



" A. ruficollis, Fabr., affinis sed alius." — Th. 



This is possibly conspecific with one of the foregoing species, but I cannot identify it. 



86. Agrilus vigilans. (Tab. VI. figg. 4, 4 a,b.) 



iEnescens, nitidus ; capite viridi-cyaneo, crebre punctato, medio sulcato ; thorace laste cyaneo, undatim striolato, 

 ant:c3 et postice foveola impresso ; elytris rufo-cupreis, macula basali altera ante medium oblonga griseo- 

 pubescentibus, apice pube grisea asperso ; antennis nigris, basi geneis. 



Long. 2| lin. 



Hab. Mexico, Acapulco in Guerrero (Hoge). 



The head is rather strongly punctured, but the punctures are somewhat vague ; 

 the longitudinal channel extends from the clypeus nearly to the back of the head ; 

 the clypeus is brassy. The thorax is blue (tinted with green in some lights); the 

 two discoidal impressions are distinct, slightly elongate ; the posterior ridge is fine and 

 nearly straight (fig. 4 a). The elytra are closely asperate, reddish-coppery, with the 

 sutural area inclining to purple and the apex tinted with golden, very acuminate at the 

 apex ; the subcosta is distinct, gradually approaching the suture posteriorly ; each 

 elytron has a pale grey pubescent spot at the base and another oblong one just before 

 the middle, and the whole of the apex is sprinkled with fine short pubescence of 

 the same colour. The prosternal chin-piece is gently emarginate. The prosternum is 

 finely, but rather roughly punctured, especially the intercoxal process, which has its 

 lateral margins raised. The metathoracic episterna are finely and closely punctured. 

 The abdomen is finely and moderately closely punctured; the lateral carina of the 

 basal segment is parallel to the margin of the elytra (fig. 4 b). 



A second specimen from the same locality differs from the one above described in 

 being greenish-golden, with the elytra coppery ; the antennae longer, reaching to the 

 base of the thorax ; the elytra apparently rather narrower, and each more decidedly 

 obliquely truncate inside and outside at the extreme apex, which is serrate ; the head 

 and thorax more roughly sculptured ; and the prosternal process more densely clothed 

 with silky pubescence. 



These differences may be sexual. 



87. Agrilus simulans. (Tab. VI. figg. 5, 5 a.) 



JEnescens, nitidus ; capite thoraceque cyaneis ; elytris cuprascentibus, macula basali altera ante medium 

 strigaque apicali griseo-pubescentibus ; abdominis marginibus plus minusve rufo-cupreis, segmenti basalis 

 carina laterali medio sinuata ; metasterno coxisque posterioribus pube ocbracea ornatis. 



Long. 2 1 lin. 



Hab. Mexico, Acapulco in Guerrero (Hoge). 



This insect is extremely like A. vigilans. It differs, however, in the following 

 points : — The punctuation of the head is very fine, and the colour is more violet. The 

 elytra have the subcosta parallel to the suture for about two thirds their length, and 

 then it rather suddenly turns in towards the suture, and then again runs parallel to it 

 (fig. 5), the space between it and the suture being filled by a narrow stripe of pale 



