AULONIUM. 469 
1. Aulonium frontale, sp.n. (Tab. XV. fig. 2.) 
Vertice bituberculato. Oblongum, angustum, minus depressum, ferrugineum, parum nitidum ; prothorace 
sex-sulcato, angulis posterioribus obtusis. 
Long. 4-43 millim, 
Hab. Mexico, Motzorongo in Vera Cruz (Flohr); GuatemaLa, Zapote, Torola 
(Champion). 
This is the only one of our species with the vertex bituberculate. Antenne short, 
with very broad club. Head short. Thorax elongate, with the two median lines 
deep, subparallel, but distinctly divergent posteriorly; the intermediate line bounded 
externally in front by a raised carina, and on the space between it and the median 
lines there is a short obsolete carina; the outer groove is close to the side. ‘The 
elytra are feebly punctate-striate, the shoulders not dentiform, the intra-humeral plica 
excessively short. 
- We have received only one example from each locality. I am not sure that the one 
from Mexico really belongs to the same species, as it has the prosternum in front of 
the coxze scabrous. 
2. Aulonium belti, sp. n. (Tab. XV. fig. 3.) 
Oblongo-ovale, subdepressum, nigrum, nitidum, antennis pedibusque rufis ; prothorace sex-sulcato, sulculis plus 
minusve evidenter punctatis ; elytris fortiter seriatim punctatis. 
Long. 73 millim. 
Hab. Nicaraaua, Chontales (Belt). 
Antenne red, the club large and stout. Head short, uneven, with a short, fine 
transverse line on the disc. ‘Thorax much narrowed in front, and with the anterior 
angles very prominent, shining, finely and sparingly punctured; along the middle with 
two rather strongly impressed lines composed of not quite connected punctiform 
impressions; on each side the middle with a similar longer line, and with another 
groove quite near the side; in propinquity with this latter there is much punctuation, 
and just within it, about the middle, there is a vague depression; the intermediate 
line is bounded externally in front by an elevation of the surface carried forwards so 
as to project and leave a deep emargination of the front just behind the eye; the pair 
of these carina-like elevations are connected in front by a very broad margin, which is 
limited behind by a series of coarse punctures ; there is a feeble tuberculiform elevation 
on each side of the middle of the thorax near the front; the hind angles are rectan- 
gular. The elytra bear very regular series of large punctures, and the shoulders are 
minutely dentiform. Under surface very shining, the prosternal process unusually broad. 
Only one example of this fine and distinct species was obtained. 
8. Aulonium tubulum, sp. n. 
Angustum, oblongum, minus depressum, nigro-piceum, antennis pedibusque dilutioribus; prothorace sericeo- 
subopaco, sex-sulcato, sulculis intermediis externe bene carinato-limitatis, sulculis mediis bene impressis, 
