74. HETEROMERA. 
formis, from Brazil, which is contained in the British Museum, leaves no room for 
doubt that Calophthalmus, Thoms., is synonymous with it; moreover, the few words 
of description gived by Gray,—“ Antenne nearly as long as the head and thorax, much 
serrated ; palpi with the last joints securiform ; thorax square; the body in the form 
of an elongate cone,”—point conclusively to the same genus. In Gemminger and 
Harold’s Catalogue, Stilpnonotus is erroneously given as a synonym of Eurypus, 
Kirby. Tenebrio nitens, Oliv., and Hurypus cupripennis, Pascoe, both from Brazil, 
probably belong to Stilpnonotus. Thomson included two very closely allied species 
in his genus Calophthalmus, one from Mexico and the other from Brazil; the latter 
is possibly not distinct from 8. ewrypiformis. The recently described Calophthalmus 
tenuicornis, Fairm., from Minas Geraes, cannot be included in this genus. In addition 
to the species from Mexico, we have now to record another from Nicaragua. 
1. Stilpnonotus mexicanus. 
Calophthalmus mexicanus, Thoms. Musée Scient. p. 21, t. 8. figg. 1-1c". 
Hab. Mexico}, Cordova (Sallé), Misantla, Jalapa (//6@e). 
Our numerous examples vary from 74-13 millim. in length. The Brazilian species 
are extremely closely allied to S. meaicanus, and apparently only differ from it in the 
rather different punctuation of the upper surface. One of these, Calophthalmus post- 
signatus, Fairm., from Minas Geraes, is very closely allied to S. mexicanus, most of our 
examples of which have the thorax deeply impressed in the middle at the base and the 
elytra with a common sutural black patch near the apex, characters stated by Fairmaire 
to be peculiar to S. postsignatus. 
2. Stilpnonotus thomsoni. (Tab. IV. fig. 1.) 
Piceo-castaneous, shining, the elytra castaneous, the prothorax (and the elytra indistinctly) with a greenish- 
eeneous tinge. Head finely and densely punctured; antenne piceous, short, not reaching to the base of 
the prothorax, joints 4-10 strongly serrate; prothorax densely and not very finely punctured, the depres- 
sion in front of the scutellum very deep; scutellum distinctly punctured ; elytra widest a little beyond 
the middle, and thenee converging to the apex, the surface very closely and moderately finely punctured ; 
legs reddish, the tarsi piceous ; beneath piceo-castaneous (the ventral surface lighter), with a greenish- 
eeneous tinge, and closely and not very finely punctured. 
Length 10 millim. 
Hab. Nicaraava, Chontales (Janson). 
A single example, contained in Mr. F. Bates’s collection. This species is closely 
allied to S. mexicanus, but differs in the very much closer punctuation of the upper 
and under surfaces, and also in having the elytra more obliquely narrowed behind (in 
S. mexicanus they are much wider towards the apex) and comparatively less elongate. 
As in §. meaicanus, the transverse scutellum is surrounded by a groove and appears to 
be raised; and the elytra are strongly margined at the base and have a large and deep 
depression on each side within the humeri. 
