115 
as common an insect at Ega as its sister form is at Para. It is 
possible that it may be the species described by Thomson as 
Beltista adjuncta] but the following phrase in this author^s 
diagnosis^ “pro thorax et elytra extremitate nigra, illo versus 
apicem maculis 2 albis nebulosis/^ is quite unsuited to our C, 
nigricollisy there being no white spots near the apex of the tho- 
rax. The locality of Beltista adjuncta is given as San Domingo; 
but M. Chevrolat (/. c. p. 188) states that this is an error, the 
species being from Cayenne, and identical with Cosmotoma ve- 
nustulum of Dejean^s Catalogue. 
Genus Stenolis, nov. gen. 
Body elongate, slightly convex, free from setse. Forehead 
short. Antennse elongate, slender, furnished with short setae. 
Thorax somewhat narrow; lateral spines existing as minute 
tubercles at a distance from the hind angles. Elytra smooth, 
truncated. Thighs clavate ; basal joint of the hind tarsi about 
equal to the two following taken together. Apical abdominal 
segment in the males (the only sex known) somewhat elongated, 
rounded, and entire at the tip; the ventral plate with a longish 
pencil of hairs on each side. 
The single species constituting this genus cannot be included 
in any of the allied genera, on account of its peculiarities in the 
form of body and shape of the terminal apical segment of the 
abdomen. In form it agrees pretty well with certain species of 
Nyssodrys {N. guttula and allies), but differs from them in the 
apical segment of its abdomen being entire. With Lepturges it 
has in common the entire apical segment; but the very different 
shape of the body and thorax forbids its being included in that 
group. The pencils of hairs at the tip of the abdomen may be 
only a specific character. 
Stenolis undulata, n. sp. 
<S. elongata, gracilis, cano-grisea : elytris fascia undulata pone 
medium et maculis utrinque duabus lateralibus brunneis. Long. 
3^ lin. S • 
Forehead dark brown, inner margins of the eyes grey ; vertex 
grey, with two blackish lines. Antennse furnished beneath with 
short setae, reddish, tips of joints dusky. Thorax gray. Elytra 
elongate-ovate, apex obliquely subsinuate-truncate, the angles 
slightly produced : surface even, finely punctured (except to- 
wards the apex), hoary grey, with a clear dark-brown zigzag 
fascia behind the middle, a curved line of the same colour near 
the scutellum, and two lateral spots — cme, large, before the 
middle, and another, smaller, near the apex. Body beneath and 
legs clothed with hoary-grey pile. 
One example, taken at Ega. 
