RHYSSOMATUS., 331 
One specimen. Recognizable by its small, conical, anteriorly constricted prothorax, 
and broad, comparatively short elytra, with very sharply costate alternate interstices, 
the suture moderately raised. Smaller than &. latus, the rostrum much shorter, 
smoother, and stouter, the eyes more distant, the prothorax narrower, the elytra with 
more rounded humeri, and much more strongly costate alternate dorsal interstices. 
9. Rhyssomatus parvulus, sp. n. 
Short, somewhat rhomboidal, dull, black or nigro-piceous, the antenne and tarsi ferruginous, very sparsely and 
finely pubescent. Head rugulosely punctate, the eyes very narrowly separated; rostrum strongly curved, 
stout, about as long as the head and prothorax, rugulose and pluri-carinate in its basal half and sparsely 
punctate and shining thence to the apex, a little smoother in the 9, the antenne inserted at or near the 
middle. Prothorax short, conical, constricted in front, rather coarsely, confluently punctate, the punctures 
separated by short, oblique, raised lines, the disc finely carinate down the middle. Elytra much wider 
than the prothorax, short, somewhat triangular, the humeri obtuse and laterally prominent ; punctato- 
sulcate, the interstices alutaceous, 3, 5, 7, 9 finely costate throughout and 8 costate at the base, the others 
flat. Legs short; intermediate and posterior tibie feebly angulate externally and ciliate thence to the 
apex ; tarsal claws subapproximate. 
Length 2;/,-23, breadth 1j-14 millim. (¢ @.) 
Hab. Mexico, Acapulco, Oaxaca (Hoge), Teapa (H. H. Smith); Guatemata, Paraiso, 
Zapote, Capetillo (Champion). 
Nine specimens. This is the smallest of the Central-American Ahyssomati, and 
easily identified by its conical, rugose prothorax, the short, subtriangular, dull elytra, 
with finely costate alternate interstices, the reddish tarsi and antenne, and the strongly 
curved rostrum. In general shape it approaches Lt. latipennis. In the British Museum 
there is a Colombian insect very like &. parvulus, labelled with the MS. name 
R. pullus, SJekel. From &. minutus, Kirsch, from Peru and Venezuela, the present 
species differs in its blacker colour, and probably in other particulars. 
10. Rhyssomatus laticollis, sp.n. (Tab. XVII. figg. 20, 20 a.) 
Broad, oval, shining, nigro-piceous, slightly mottled with rufo-piceous above, the antenne obscure ferruginous, 
very sparsely pubescent. Head densely, rugulosely punctate, the eyes contiguous; rostrum stout, slightly 
curved, a little longer than the prothorax, rugulosely punctate and pluri-carinate in its basal half and 
sparsely punctate thence to the tip, the antenne inserted about the middle. Prothorax short, at the base 
rather more than twice as broad as long, narrowing forwards and abruptly constricted in front, the base 
feebly sinuate ; closely, obliquely strigose, and also finely punctate, the disc with a very fine median 
carina. LElytra considerably wider than the prothorax, subcordate, slightly dilated at the sides beneath 
the rounded humeri; seriato-foveolate, the foves placed in very shallow striz, the interstices slightly 
rugulose, 3, 5, 7, 9 sharply costate throughout, and 8 and 10 costate at the base, the suture also raised. 
Mesosternum protuberant in front. Legs short; intermediate and posterior tibie sharply angulate 
externally and ciliate thence to the apex. 
Length 43-53, breadth 23-3 millim. (2?) 
Hab. Panama, Caldera in Chiriqui (Champion). 
Two specimens. Amongst the species with sharply costate alternate elytral inter- 
stices and obliquely strigose pronotum, the present one may be recognized by the very 
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