IBIDION.—OBRIUM. 33 
A Heterachthes according to Lacordaire’s definition. In form and proportions of 
body, as well as in colour and markings, similar to J. phoracanthoides (White). It is, 
however, shorter ; and the apices of the elytra are unarmed. The dark-brown colouring 
of the elytra occupies more than one half the surface, leaving the base (to a small 
extent) and a large apical area of the chestnut-red ground-colour. Across the dark- 
brown central area lie two broadish tawny-white slightly oblique belts, which are much 
broader towards the sides than towards the suture, which they nearly touch. The 
coarse but not very dense punctuation becomes obsolete near the apex. 
10. Ibidion obtusum. (Tab. IV. fig. 8.) 
Heterachthes obtusus, Bates, Trans. Ent. Soc. 1873, p. 221. 
Hab. Nicaragua, Chontales (Belt). 
HETERACHTHES. 
Heterachthes, Newm. Entom. p. 9. 
The species strictly congeneric with Heterachthes ebenus of Newman are very few 
in number, and inhabit chiefly the warmer latitudes of North America and the West- 
India Islands. 
1. Heterachthes ebenus. 
Heterachthes ebenus, Newm. Entom. p. 9. 
Hab. Nortu America, Florida, Texas.—Nicaraava, Chontales (Lelt).—Souru AMERICA, 
Venezuela. 
I have carefully compared specimens taken by Mr. Belt with others sent by Mr. . 
Belfrage from Texas, and found no difference of any importance between them. 
Venezuelan examples show a more distinct punctuation on the thorax. 
ALCYOPIS. 
Alcyopis, Pascoe, Ann. & Mag. Nat. Hist. ser. 3, xviii. 1866, p. 484. 
Two species of this distinct genus are known—one from Brazil, and the following 
from Nicaragua :— 
1. Alcyopis chalcea. (Tab. IV. fig. 18.) 
- Alcyopis chalcea, Bates, Trans. Ent. Soc. 1874, p. 221. 
Hab. Nicaraeva, Chontales (Belt). 
OBRIUM. 
Obrium, Serv. Ann. Soc. Ent. Fr. 1884, p. 93. 
About a dozen species of this curious genus of small Cerambycide are known. 
They occur both in North and South America, in Europe, and the islands of Tropical 
Asia. The species from continental Africa, recorded in the Munich catalogue as 
BIOL. CENT.-AMER., Coleopt., Vol. V., Feb. 1880. f 
