328 RHYNCHOPHORA. 
Hab. Guatemata, Teleman in the Polochic Valley (Champion). 
One specimen. Differs from all the allied species in its oblong general shape, the 
strongly bisinuate base of the prothorax, and the densely rugose, punctato-sulcate 
elytra, the interstices of which are not in the least costate. In general facies, 
R. rugosus is very like a Lemosaccus. There is a somewhat similar unnamed South- 
American form in the British Museum. 
2. Rhyssomatus rugulipennis, sp.n. (Tab. XVII. figg. 15, 10a, 3.) 
Oblong-oval, dull, black or piceous, antenne, and sometimes the rostrum, legs, and elytral coste, obscure 
ferruginous, finely and rather closely pubescent. Head densely, rugulosely punctate, the eyes rather 
narrowly separated ; rostrum (¢ ) stout, feebly curved, a little longer than the prothorax, carinate, and 
densely, rugulosely punctate, (2) longer and much smoother, the antenne inserted at the middle in the 
@ and nearer the apex in the ¢. Prothorax at the base twice as broad as long, rounded at the sides 
and constricted in front; closely, longitudinally strigose, and finely carinate down the centre. Elytra 
wider than the prothorax, subparallel towards the base, the humeri not prominent ; punctate-striate, the 
punctures coarse and oblong in shape, the interstices closely rugulose, 3, 5, 7, 9 costate throughout and 
8 costate at the base, the others flat. Beneath closely punctate. Legs short, moderately stout ; 
intermediate and posterior tibie: sharply angulate externally and ciliate thence to the apex. 
Length 5;-63, breadth 38-32 millim. (d ¢.) 
Hab. Mexico, Durango city (Hége), Sierra de Durango (ex Flohr). 
Near the North-American R. lineaticollis (Say), but more pubescent, the elytra 
parallel-sided towards the base, closely rugulose, and with the coarse seriate punctures 
placed in rather deep striae. Many specimens. 
8. Rhyssomatus yucatanus, sp. n. 
Oval, shining, nigro-piceous, the antenne and legs (the anterior femora excepted) obscure ferruginous, very 
sparsely and finely pubescent. Head densely, rugulosely punctate, the eyes contiguous; rostrum 
moderately stout, feebly curved, a little longer than the head and prothorax, sparsely, finely punctate, 
subcarinate at the base, the antenne inserted at the middle. Prothorax at the base rather more than 
twice as broad as long, narrowing forwards and abruptly constricted in front, the base feebly trisinuate ; 
coarsely, longitudinally strigose on the disc and with a smooth, raised, median line, the strige becoming 
oblique towards the sides. Elytra rather short, somewhat triangular, a little wider than the prothorax ; 
seriato-foveolate and sparsely, feebly granulate, the interstices 3, 5, 7, 9 sharply costate, and 8 and 10 
costate at the base, the suture also raised. Mesosternum slightly protuberant in front. Legs short ; 
intermediate and posterior tibie sharply angulate externally and ciliate thence to the apex. 
Length 44, breadth 2? millim. (2.) 
Hab. Mexico, Temax in N. Yucatan (Gaumer). 
One specimen. This insect has the prothorax formed as in R. Jaticollis, except that 
the disc is coarsely, longitudinally strigose; the elytra, however, are relatively narrower 
and distinctly granulate, and the foveee are smaller; and the rostrum is longer and 
more slender. In the sculpture of the prothorax it approaches Rk. rugulipennis and 
R. lineaticollis. 
