CRATOSOMUS. 5D. 
y. The prothorax with three or four spo‘s (one or two on the disc at the base and one on each flank); the 
elytra sharply nigro-bifasciate, the rest of their surface with a dense, white or yellowish vestiture, the 
tubercles small and few in number. (Fig. 7.) 
Mexico—Chihuahua and Durango (four examples). 
The pygidium is broadly exposed beneath in both sexes, which are scarcely 
distinguishable by external characters, though the rostrum in some of the larger males 
is carinate to near the tip. The femora are always cinereo-annulate towards the apex ; 
the anterior pair are sometimes unarmed. The length varies from 13-23 and the 
breadth from 54-11 millimetres. The three specimens (of the var. (3) from Trinidad, 
in the British Museum, appear to have been found in the Botanic Gardens there, and 
they may have been introduced in some way from Mexico. 
3, Cratosomus lafontii. (Tab. I. fig. 8.) 
Cratosomus lafontii, Guér. Icon. Régne Anim., Ins. p. 163°. 
Hah. Panama (Conradt).—CotomBia!; Braziu. 
We have a single specimen of this insect supposed to have been taken at Panama, 
agreeing with another from Colombia in our collection. It is easily recognized by its 
dense yellowish vestiture and sparsely tuberculate elytra; the prothorax with a broad, 
transverse, black median fascia (interrupted at the middle in the two examples before 
me), the elytral tubercles (that near the base of the third interstice and the one 
on the shoulder larger than the rest) almost bare. The rostrum is broad, flattened, 
and almost straight, finely punctate and obsoletely carinate in its basal half. The eyes 
are widely separated and the interocular space flattened. The pygidium is large and 
broadly exposed beneath. The femora are conspicuously annulate near the tip. 
4, Cratosomus gemmatus. (Tab. I. figg. 9, 9a-c, ¢; 10, 2.) 
Cratosomus gemmatus, Lec. Proc. Acad. Phil. 1858, p. 79°. 
Hab. Mexico, Tampico in Tamaulipas (Haldeman'), Juquila (Sadlé), Amatan in 
Chiapas (Flohr); GuareMaa, Panima in Vera Paz (Champion); Nicaragua, Chontales 
(Belt, Janson); Panama, Bugaba (Champion), Chiriqui (7rétsch): 
Of this species, described from a single specimen from N.E. Mexico, we have 
received eleven examples, including both sexes. It is the only Central-American 
Cratosomus with the disc of the prothorax and each of the elytral interstices studded 
with small shining tubercles, which, however, are sometimes much reduced in number 
on the prothorax. The eyes are very large, narrowly separated or subcontiguous. ‘The 
rostrum is rather long and arcuate, widened, depressed, and carinate at the base, and 
sometimes feebly dentate at the sides in the male. The pygidium of the male is 
broadly, and that of the female narrowly, exposed beneath. The sculpture of the 
