ISCHIODONTUS. 335 



Varies in size and colour. The males have the sides of the thorax much less 

 rounded than in the females, the sides obliquely converging from the base in some 

 specimens of this sex. The three examples from British Honduras are ferruginous in 

 colour, and less elongate, but they apparently belong to the same species. 



40. IschiodontllS brevis. (Tab. XIV. figg. 23, <s; 23 a, antenna; 23 5, 

 genitalia, d .) 



Moderately elongate, rather broad, shining; pitchy-brown or brownish-ferruginous, the legs and antennae 

 ferruginous, the under surface fusco-ferruginous ; above and beneath thickly clothed with long yellowish- 

 cinereous hairs. Head convex, in some male specimens feebly triangularly depressed in the middle 

 between the eyes, closely, rather coarsely punctate ; the frontal carina prominent, rounded anteriorly ; 

 antennae less than half the length of the body, slender, joint 3 small, slightly longer than 2. Prothorax 

 convex, strongly transverse, the sides gradually converging from the base, rounded anteriorly ; the hind 

 angles moderately produced, parallel or feebly divergent, carinate above ; the usual notches on the basal 

 margin small or indistinct ; the surface thickly, finely punctate, the punctures becoming much coarser at 

 the sides anteriorly, and finer and more scattered towards the base, feebly canaliculate behind. 

 Elytra about three times the length of the prothorax, in both sexes subparallel to the middle and 

 narrowing thence to the apex, the apices slightly mucronate ; finely punctate-striate, the interstices flat 

 and somewhat thickly punctured. Beneath closely punctured ; prosternal sutures deeply excavate in 

 front; mesosternum declivous; posterior coxal plates broadly triangularly widened above the point of 

 insertion of the femora. 



Length 9-10, breadth 2|-3 millim. ( tf $ .) 



Bab. Mexico, Tuxtla (Salle), Teapa (coll. Janson) ; Guatemala, Panzos, Teleman, 

 Chacoj, and San Juan in Vera Paz (Champion) ; Panama, Bugaba, Volcau de Chiriqui 

 (Champion). 



Numerous examples. Closely allied to /. ichthydius, Cand., and occurring in the 

 same localities, but differing from that insect in its less elongate shape, the elytra in 

 both sexes relatively shorter, subparallel to the middle, and slightly mucronate at the 

 apex. The punctuation of the thorax and of the elytral interstices is not so dense as 

 in /. alopex, I. deletus, and /. punctatus, Cand. 



The insect is unknown to Dr. Candeze. A male from Bugaba is figured. 



41. Ischiodontus rufus. 



Ischiodontus rufus, Cand. Monogr. Elat. ii. p. 130 \ 

 Hab. Mexico \ Teapa in Tabasco (coll. Janson). 



There is a single male specimen of this species from Teapa in the Janson collection ; 

 it differs from the type (a female) in having the elytra rapidly narrowing from about 

 the basal third. 



In this insect the humeri of the elytra are rather deeply excavate for the reception 

 of the hind angles of the thorax, and the fine carina on the latter is curved inwards 

 anteriorly (instead of being parallel with the margin), characters separating I", rufus 



