HYPOTELUS.—ZIROPHORUS. T1L 
3. Hypotelus marginatus. (Tab. XIX. fig. 2.) 
Niger, pedibus piceis; elytris rufis, nigro-marginatis ; prothorace crebre sat fortiter punctato. 
Long. 24 millim. 
Hab. Guatemaa, Senahu 2500 feet (Champion). 
Closely allied to H. hostilis, but the antenne are entirely black; and in the male 
there is no tooth on the basal joint of these organs, the alternate joints being, however, 
armed with longer sete. One pair. 
ZIROPHORUS. 
Zirophorus, Dalman, Sv. Ak. Handl. 1821, p. 871; Anal. ent. p. 23 (1828). 
Piestus (pars), Erichson, Gen. et Spec. Staph. p. 830 (1840); Fauvel, Bull. Soc. Linn. Normand. 
ix. p. 21 (1865); Notices ent. ii. p. 17. 
The Piesti with elongate mandibles and the head armed in both sexes with porrect 
prominences or horns form a very distinct genus; they are distinguished quite naturally, 
even abruptly, from the typical species with short, inconspicuous mandibles, and the 
head unarmed but more or less depressed in the middle. I propose to revive Dalman’s 
name of Zirophorus for the former of the two genera: this course will, I believe, be 
found convenient, though the three species, viz. Z. fronticornis, Z. penicillatus, and 
Z. spinosus, on which Dalman established the genus, include amongst them one true 
Piestus—penicillatus. 
Zirophorus is one of the most remarkable of the genera of the family, and is peculiar 
to Tropical America; it includes, in addition to the three species found in our region, 
Piestus lacordairei, Ex., P. longipennis, Fauv., P. spinosus, Lap., P. capricornis, Lap., 
and P. validus and P. frontalis, Sharp. 
1. Zirophorus planatus. (Tab. XIX. fig. 3.) 
Nigerrimus, depressus, parallelus, nitidus; fronte cornubus duobus porrectis distantibus armato. 
Long. 10-12 millim. 
Hab. Maxico, Cordova (Sallé); Britis Honpvras, R. Sarstoon (Blancaneaua) ; Gua- 
TEMALA, Sinanja (Champion) ; Nicaragua, Chontales (Belt, Janson); Panama, Volcan de 
Chiriqui 2000 to 3000 feet (Champion). 
Closely allied to P. spinosus, Lap., but entirely black in colour, with the frontal 
horns less parallel, and the clypeal suture sharply angulate in the middle. The disc of 
the thorax is punctate. The elytra each have five punctate stric, and a sixth incomplete 
stria externally. The hind body is punctured at the base and sides of each segment, 
but the apical portion of each segment is broadly smooth. 
This remarkable insect appears to be rare, and Mexico and Guatemala have each 
yielded as yet but one example. About half a dozen specimens, however, have been 
brought from Chontales. 
