ISCHIODONTUS. 327 



thorax. In some of the specimens the elytra are finely punctate-striate and the inter- 

 stices flat on the disc, as in the type ; but in others the elytra are coarsely punctate- 

 striate throughout, with the interstices convex. The punctures on the head and thorax 

 are very coarse, close, and umbilicate. 



23. Ischiodontus atrocaeruleus. 



Ischiodontus atrocaruleus, Cand. Monogr. Elat. ii. p. Ill \ 

 Dipropus angusticollis, Sturm, in litt. 



Hab. Mexico (Salle, ex Sturm), Vera Cruz (coll. Chevrolat 1 ). 



The type of this species, a male, has been kindly communicated by M. Fleutiaux of 

 Paris, and there is a specimen, also a male, in the Salle collection. It may be known 

 from its allies by the bluish-black elytra. The prosternal sutures are scarcely grooved 

 in front. 



24. Ischiodontus cyanopterus. (Tab. XIV. fig. 13, 2 .) 



Ischiodontus cyanopterus, Cand. Monogr. Elat. ii. p. 112 1 . 

 Hab. Mexico, Cordova in Vera Cruz (Salle 1 ). 



I have seen three specimens of this beautiful species, all females. 



25. Ischiodontus resplendens. (Tab. XIV. fig. 14, $ .) 



Elongate, subcuneiform, convex, very shining ; black, the elytra brilliant violaceous, this colour changing into 

 metallic green at the base and sides and beyond the middle, and to golden at the apex ; the abdomen 

 entirely rufous ; the legs blackish-brown ; above and beneath somewhat thickly clothed with moderately 

 long hairs, which are blackish on the upper surface. Head convex, sparsely, finely punctate, deeply 

 excavate on either side in front, the frontal carina prominent, rounded anteriorly ; antennae moderately 

 long, the joints from the third broadly widened and serrate, becoming narrower outwards, 3 and 4 sub- 

 equal. Prothorax as long as broad, convex, the sides a little rounded and rapidly converging from the 

 middle forwards ; the hind angles strongly produced, curved inwards at the tip, not carinate above ; the 

 surface sparsely, finely punctate, canaliculate behind. Elytra elongate, gradually narrowing from the 

 base, slightly depressed along the suture anteriorly ; sparsely, finely punctate, without trace of 

 striae, except along the suture ; the interspaces quite flat, even at the base. Beneath sparsely punctured ; 

 prosternal sutures feebly excavate in front ; mesosternum declivous, the sides a little raised ; posterior 

 coxal plates triangularly widened opposite the point of insertion of the femora. 



Length 15|, breadth 3| millim. ( $ .) 



Hab. Guatemala, San Geronimo (Champion). 



One specimen. Allied to /. cyanopterus, Cand., but larger and much more elongate, 

 the hind angles of the thorax not carinate above, the abdomen rufous. It is more 

 brilliantly coloured than any species of the group Dicrepidiini yet discovered. 



26. Ischiodontus virens. 



Moderately elongate, rather narrow, feebly convex, shining; pitchy-black, the elytra greenish-aeneous, the 

 antennae black, the legs and under surface piceous, the coxae, knees, and tarsi more or less ferruginous ; 

 above and beneath thickly clothed with very long yellowish-cinereous hairs. Head densely, moderately 



