11 
P. Atys. 
Head midway between the eyes and the hind margin, with a small 
wide spine; a slight, crested, straight ridge over each eye, the space 
between slightly grooved; antennae thickish. In colour it is of a 
dark pitchy brown; the apex of the elytra somewhat ferruginous; 
legs pitchy brown ; tarsi and tips of tibiae ferruginous ; palpi of a 
clear ferruginous : sculpture much as in last. 
Hab. Andes of Peru. 
P. Iphis. 
Deep black, coarsely punctured and rugose; antennae at the ends, 
palpi, tibiae at apex and tarsi reddish ; head midway between the eyes 
and hind margin, with a strong wide spine on each side; head with 
the two keels over the eyes short and straight, the space between 
them deeply grooved. 
Hab. Mexico. 
Calocomus morostjs. PI. XIII. fig. 3. 
Antennae ferruginous, black at the base ; 13-jointed, very strongly 
serrated on the outside, the terminal joint deeply notched, nine at 
least of the terminal joints with the outer edge elongated at the tip: 
head, thorax, scutellum, abdomen and legs pitchy black; head, tho¬ 
rax and scutellum thickly punctured ; elytra thickly and finely punc¬ 
tured, the punctures of the base coarser; elytra wide, shorter than 
the abdomen, ferruginous, in some places darkish brown. 
Hab. Bolivia. From the Collection of Mr. Bridges. 
This makes the fourth species of Calocomus , a genus which seems, 
like some of the other Prionidcc, to be very variable in the number of 
joints in the antennae ; the type C. Des?narestii has eleven joints ; this 
species has thirteen ; while the Calocomus Lycius , and C. Kreuckelyi , 
described by M. Buquet, have no less than twenty-two. 
Pyrodes tenuicornis. PL XIII. fig. 5. 
Head and thorax deeply, coarsely and irregularly punctured, washed 
with golden green, in some lights tinged with a deep purplish rufous ; 
jaws golden green, tips and edges pitchy ; antennae with the first joint 
flattened above, golden green except at the end, which is bluish 
green; third joint much elongated, as long as the fourth and fifth 
taken together ; the first six joints punctured, base of the seventh 
punctured, tip of the seventh joint and the whole surface of the ter¬ 
minal four grooved. Elytra varied with green and purplish red, 
much depressed, the margin and shoulders lively green; scutellum 
notched at the end, slightly grooved down the middle, and with a 
patch of coarse punctures on each side of the groove. Under parts 
green with aeneous reflections. 
Femora green and covered with minute crowded warts ; tibiae and 
tarsi light rufous, the tibiae with elongated papillae and short hairs. 
Hab. Mexico. 
Of this species there are two examples in the Museum ; in the one 
figured a purplish red tint pervades all the joints of the antennae but 
