ISCHYKTTS.— CALLISCHTEUS. 45 



straight sides, much narrowed in front ; the front and hind angles more acute than in 

 I. tetrastictus ; deeply and thickly punctured ; the four black dots in a slightly arcuate 

 line, the base black in the middle. The elytra are narrower than in /. tetrastictus ; the 

 humeral spot is separate ; the striae are fine and have the punctures packed very closely 

 all along, but the punctures are very small (and owing to the comparative narrowness 

 of the insect the strise appear closer together than usual) ; the fascia reaches the 

 margin. 



I have seen but one specimen of this species. 



21. Ischyrus collatinus. 



Ischyrus collatinus, Crotch, Cist. Ent. i. p. 433 \ 



" Eulvus, oblongus, subtus niger, prosterni lateribus rufis ; capite rufo, vertice nigro ; thorace crebrius punctatis, 

 subtransverso, lateribus rotundatis, antice angustiore, linea transversa]! discoidali nigra (utrinque abbre- 

 viata) basique nigro marginato in medio ; scutello nigro ; elytris sublsevibus, punctato-striatis, singulo 

 maculis nigris 7 — 1 transversa paullo infra scutellum, 1 minima marginem versus, 1 transversa paullo ante 

 medium, 1 minima marginem versus, 1 obliqua in tertia apicali, 1 subapicali, ad suturam conjuncta." 

 Long. 7 millim. 



Hab. Nicaeagua, Chontales {Belt, Janson). — South America, Colombia l . 



This is a peculiarly-coloured species, and it has the broad depressed form of many 

 Mycotreti; the eyes, however, are coarsely faceted, and the prosternum is sharply 

 compressed and carinate in front. Crotch mentions seven spots on each elytron ; but 

 from his description, which we give in full, it will be seen there are but six, which is 

 the fact. 



The body beneath and the legs in our specimens are pitchy, and the colour above is 

 yellow rather than fulvous. 



22. Ischyrus distinguendus. (Tab. II. fig. 23.) 



Ischyrus distinguendus, Lac. Monogr. Erotyl. p. 111 1 . 

 Hab. Mexico \ Toxpam {Salle). 



A fine species (10 J millim.), easily recognized by the tridentate basal mark on the 

 thorax, and by the elytral markings, the large black patch behind the middle being 

 somewhat heart-shaped. The colour appears to be either yellow or chestnut-red. 

 There is one example in Crotch's collection, which was probably obtained by Chevrolat 

 from M. Salle. 



CALLISCHYEUS. 



Callischyrus, Crotch, Cist. Ent. i. p. 434 (1876). 

 Ischyrus, Laeordaire, Monogr. Erotyl. p. 89 (1842) (pars). 



This genus was proposed by Crotch to include eight species, of which Erotylus 

 insignis, Laporte, was the type. The eyes are more finely granulated than in Ischyrus 



