320 SERKICOKNIA. 



5. Ischiodontus depressus. 



Ischiodontus depressus, Cand. Monogr. Elat. ii. p. 115 \ 

 Bab. Mexico 1 . 



I have before me two specimens of this species determined by Candeze ; both are 

 males. I. depressus resembles 7". badius, but differs from it in having the punctures on 

 the head and thorax finer and not distinctly umbilicate, and the elytra deeply punctate- 

 striate. It is more parallel and less convex than I. anceps and its allies, and has the 

 third and following antenual joints more produced at their inner apical angle. 



6. Ischiodontus tuspanus. 



Ischiodontus tuspanus, Cand. Monogr. Elat. ii. p. 113 \ 



Bab. Mexico \ Tuxtla (Salle), Teapa [Pilate, in coll. Janson) ; British Honduras 

 {coll. Janson), R. Hondo (Blancaneaux) ; Guatemala, Yzabal (Salle), Coban (Conradt) ; 

 Nicaragua, Chontales (Belt, E. M. Janson), 



The specimens of this species described by Candeze are reddish-brown or castaneous 

 in colour ; but this colour is not constant, many of our examples having the head and 

 thorax (the hind angles excepted) infuscate or piceous, and the elytra slightly in- 

 fuscate, or with the apex darker. I. tuspanus is closely allied to I. anceps, but it is 

 lighter in colour ; the antenna? are less elongate in the male ; the elytra are more 

 parallel in both sexes, narrowing from about one-third from the base in the male and 

 from the middle in the female. The antennae are ferruginous, about half the length 

 of the body in the male, shorter in the female, the joints from the third rather broadly 

 widened, becoming narrower outwards. 



7. Ischiodontus posticus. (Tab. XIV. fig. 8, <$ .) 



Ischiodontus posticus , Cand. Elat. Nouv. v. p. 22 \ 



Hab. British Honduras 1 (coll. Janson) ; Guatemala (Salle), Coban (Conradt), Sabo 

 and San Geronimo in Vera Paz (Champion). 



Closely allied to /. anceps, Cand., and with the head and antennas formed as in that 

 species, but differing from it in having the elytra reddish-brown, with the apical third 

 black. Two males from San Geronimo, Guatemala, perhaps belong to the same 

 species ; they have the thorax lighter in colour and more coarsely punctured. A male 

 from Coban is figured. 



8. Ischiodontus elongatus. 



Very elongate, moderately convex, rather shining ; variable in colour — reddish-brown, with the sides of the 

 elytra in some specimens broadly infuscate, or pitchy-brown, with the hind angles of the prothorax and 

 the suture obscure ferruginous ; the antenna?, epipleuree, and legs ferruginous ; above and beneath 



