MYSTROPS. 267 
Antenne very long, stout; first joint incrassate, a little concave above, joints 2-8 nearly 
similar to one another, each thicker at the extremity, ninth joint longer but similar in 
form, tenth and eleventh quite short and not broader. Front of head hollowed; upper 
edge of mandibles elevated. Thorax strongly transverse, sparingly and not very finely 
punctured, all the angles minutely prominent. Elytra of a more pallid yellow colour, 
but infuscate about the scutellum, rather sparingly and coarsely punctate. The exposed 
parts of the hind body quite short. 
We have received three examples of this very distinct species ; one of them has the 
antenne much shorter, but I have no doubt they are all males; there is no supplementary 
apical segment. The prosternal process is margined, dilated, and a good deal prolonged 
behind the coxz, a little curved upwards. The structure of the mandibles (fig. 9 @) is 
very peculiar, and, conjoined with the depressed front of the head, makes the species 
very easy of recognition. 
3. Mystrops teapensis, sp.n. (Tab. VIII. fig. 10.) 
Oblongo-ovalis, convexiusculus, subtiliter pubescens, subtilius crebre punctatus, subopacus, testaceus, pectore 
antennarumque clava fuscescentibus. 
Long. 24 millim. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
Female.—Antenne reaching not quite to the back of the thorax ; first joint of club 
short, not much longer than the second. Head scarcely impressed in front, finely but 
distinctly punctate. Thorax convex, a good deal narrowed in front; anterior angles 
obtuse, the hind angles rendered indistinct by long cilie; the surface finely but dis- 
tinctly, moderately closely, punctate. lytra elongate, quite as finely and scarcely so 
closely punctate as the therax, leaving two dorsal segments exposed. 
We have received one specimen only of this species ; but as it is quite distinct from 
any other, and marks the most northern extension of this interesting genus, I have de- 
scribed it without hesitation. I have an allied undescribed species from the valley 
of the Amazons in my collection. 
4. Mystrops mexicanus. (Tab. VIII. figg. 7,6; 8,2.) 
Priops meaicanus, Reitter, Verh. Ver. Briinn, xii. p. 168 4 
Oblongus, pallide flavus, subtiliter pubescens, obsolete punctulatus, opacus. 
Long. 13-21 millim. 
Hab. Muxico, Tacubaya!; Panama, Volcan de Chiriqui (Champion). 
Eyes large, prominent. Head extremely finely punctate, feebly transversely impressed 
in front. Thorax strongly transverse, the sides slightly narrowed in front, very little 
curved, truncate in front; hind angles rather obtuse, but rendered apparently more 
rectangular by a minute ciliation; front angles quite as distinct as the hind, slightly 
2 M* 2 
