PRIOCHIRUS. 741 
of the front coxe is remarkable, so as to form a striking contrast to the structure 
of these parts in Leptochirus. 
§1. Frontal area depressed only slightly below the level of the vertes. 
1. Priochirus laxus. 
Niger, abdominis apice piceo-rufo; vertice sat longe bicornuto, cornibus margine interno inferus prope basin 
dentato, apice subtruncato, vix perspicue emarginato, inter cornua area plana, sat depressa, margine 
anteriore bidentato. 
Long. 12 millim. 
Hab. British Honpuras, R. Sarstoon (Blancaneaux); Guatemala, Purula (Cham- 
pion). 
In this species the antenne are rather long; the supra-antennal prominences very 
obtuse; the prothoracic channel very deep, but not foveolate behind; and the horns 
of the head divergent. 
2. Priochirus bicornis. 
Leptochirus bicornis, Fauv. Bull. Soc. Linn. Normand. ix. p. 20, t. 1. £.4°; Notices ent. ii. p. 16. 
Hab. Mexico}, Jalapa (Flohr), Cordova (Sal/é). 
3. Priochirus hzemorrhous. 
Minor, sat depressus, nitidus; piceo-niger, abdominis apice, tibiis tarsisque rufis; vertice sat longe bicornuto, 
cornibus apice emarginato, inter cornua area lata, inequali, margine anteriore in medio emarginato, 
utrinque elevato. 
Long. 8 millim. 
Hab. Guatemaa, Cubilguitz, Chiacam (Champion). 
Very closely allied to P. bicornis, but with the frontal space between the horns much 
broader, the horns themselves longer and more slender and much less definitely bifid at 
the apex:; the articulations of the antennz rather longer, and the ventral segments not 
so free from sculpture. 
Six examples. 
4. Priochirus dilutus. 
Minor, sat depressus, nitidus ; piceus, elytris castaneo-rufis ; vertice sat longe bicornuto, cornibus apice emar- 
ginato, inter cornua area lata, fere plana, margine anteriore in medio late parum profunde emarginato. 
Long. 8 millim. 
Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 
Although very close to P. hemorrhous, the slight characters by which this insect is 
distinguished are quite constant in a series of sixteen examples. The colour of the 
elytra allows the species to be immediately recognized ; but, besides this, the frontal 
area is rather flatter and less deeply emarginate in front. 
