ISCH10D0NTUS. 329 



Hab. Mexico 4 , Tuxtla and Cordova {Salle), Tapachula in Chiapas (Hoge) ; Guatemala, 

 Panzos and San Juan in Vera Paz, Zapote {Champion) ; Nicakagua (Salle), Chontales 

 (Belt, E. M. Jansori) ; Panama, Bugaba, Caldera, Vol can de Chiriqni (Champion), 

 Taboga I. (J. J. Walker). — Colombia l 3 ; Venezuela ; Guiana 1 2 . 



With Candeze's specimens before me I am unable to separate /. smaragdinus from 

 /. chloropterus, the punctuation of the thorax being variable — very sparse and fine in 

 some specimens, coarse and rather close in others. The males have the thorax more 

 narrowed anteriorly, with the sides less rounded than in the females. The thorax also 

 varies in colour from rufous to almost entirely piceous ; in many specimens it is rufous, 

 with a transverse piceous band across the middle, this colour sometimes extending so 

 as to leave only the anterior margin and the hind angles rufous. A common insect in 

 Central America. The males appear to be very much rarer than the females. 



29. IschiodontllS denticornis. (Tab. XIV. figg. 16, 6 ; 16 a, antenna.) 



Moderately elongate, subcuneiform, convex, shining ; the head and antennae black, the prothorax, the elytral 

 epipleura?, and the under surface rufous or rufo-testaceous, the scutellum obscure ferruginous, the elytra 

 metallic green, with the suture obscure ferruginous, the legs testaceous ; above and beneath thickly 

 clothed with lorig yellowish-cinereous hairs. Head sparsely, rather finely punctate, transversely depressed 

 in front, deeply so in the male ; the frontal carina prominent, rounded anteriorly in the female, slightly 

 flexed downwards in the middle in the male ; antennae — ( <$ ) about four-fifths the length of the body, the 

 joints from the third very broadly widened, becoming narrower outwards, 3-8 each with their inner 

 apical angle strongly and obliquely produced, 3 and 4 subequal — ( § ) about half the length of the body, 

 the joints from the third moderately widened. Prothorax broader than long, convex, narrowing from the 

 base, the sides a little rounded anteriorly in the female ; the hind angles strongly produced, scarcely 

 divergent, carinate above ; the surface sparsely, finely punctate, canaliculate behind. Elytra moderately 

 elongate, narrowing from the base ; rather finely punctate-striate, the striae very shallow, the interstices 

 flat, sparsely minutely punctate. Beneath somewhat thickly punctate ; prosternal sutures very feebly 

 grooved in front ; mesosternum declivous ; posterior coxal plates angularly widened opposite the point of 

 insertion of the femora. 



Length 8§-9f , breadth 2-2| millim. ( <$ $ .) 



Hab. Guatemala, Zapote (Champion). 



Var. ? The elytral pubescence fuscous, the legs fusco-testaceous, the hind angles of the prothorax divergent 



Hab. Guatemala, San Geronimo (Champion). 



Three specimens — a pair of the typical form and a female of the variety. This 

 species differs from all the allied forms in the strongly serrate and exceedingly elongate 

 antenna? in the male. The frontal carina in this sex is less rounded than in the female, 

 appearing subangular in the middle as viewed from above. 



30. IschiodontllS prasinopterilS. (Tab. XIV. figg. 17, tf; 17 a, antenna.) 



Moderately elongate, narrow, rather convex, shining ; the head and antennae black, the prothorax and under 

 surface rufo-testaceous, the scutellum obscure ferruginous, the elytra (the epipleurae included) golden- 

 green, with the suture very narrowly obscure ferruginous, the legs testaceous ; above and beneath thickly 



biol. centk.-amek., Coleopt., Vol. III. Pt. 1, March 1895. 2 U 



