EUMESTORUS. 149 
the head on the under surface by a deep depression ; the mandibular processes are very 
prominent, the palpi completely concealed. The prosternum is emarginate beneath, 
so that the anterior cox are placed close to the front. The metasternum is very 
short, The second ventral segment is as long as the following two segments together. 
The corbels of the posterior tibia are cavernous in a marked degree, there being a 
conspicuous apical truncature between the two rows of ciliz external to the insertion 
of the tarsus. 
1. Eumestorus luctuosus. (Tab. VI. fig. 14, 9.) 
Epicerus luctuosus, Chevr. Bull. Soc. Ent. Fr. 1880, p. lxii*. 
Gracilis, niger, cretaceo-pictus ; capite inter oculos canaliculato-foveolato. 
Long. 7-8 millim. 
Hab. Mexico, Yucatan (Pilate!), Temax in North Yucatan (Gaumer). 
Antenne rather short; first and second joints of the funiculus equal in length, not 
elongate; club slender, acute. Rostrum very short, deeply triangularly emarginate in 
front ; the eyes are convex, rather large, and encroach in front somewhat on the front 
of the rostrum, between them is an elongate depression. ‘The thorax is elongate, 
slightly narrowed in front and a little curvate at the sides; it is rather coarsely and 
sparingly punctate, with a pale vitta along the middle, and a more obscure one on each 
flank. The elytra are rather broader than the thorax, and are coarsely and somewhat 
irregularly marked by series of distant impressions; they are covered in larger part by 
pale squamosity having a very chalky appearance, and leaving some large marks, the 
most conspicuous of which are an angulate band across the middle and an oblong or 
oval mark at the base at each side; the whole of the upper surface bears scanty, very 
minute depressed setze, the size of the sete being less than that of the scales. 
A good series was obtained of this species, as well as of the next; the female is 
usually larger and broader than the male, and has the suture of the elytra at the 
declivity more prominent. We figure a specimen of this sex. 
A type from his collection has enabled me to determine Chevrolat’s description as 
belonging to this species. 
2. Eumestorus proximus, sp. n. 
Gracilis, breviter setosus, niger, griseo-squamosus, in elytris nigro-variegatus; capite inter oculos profunde 
impresso. 
Long. 6-7 millim. 
Hab. Mexico, Temax in North Yucatan (Gaumer). 
This insect is excessively similar to L. ductwosus, but differs in several respects, and 
as a fair series was obtained there can be little doubt that the two are quite distinct. 
E. proximus has the head more distinctly constricted behind the eyes; the setosity of 
the upper surface erect and distinct, though quite short ; and the markings of the upper 
