ia] 
DIORYMERUS. 215 
1. Diorymerus serripes, sp.n. (Tab. XII. figg. 11, lla, @; 114, ant. tibia.) 
Subrhomboidal, convex, shining, black, the punctures of the under surface and legs each bearing a minute 
scale, the tibise with long fine hairs on their inner edge. Head sparsely, minutely punctate, with a 
distinct transverse frontal groove ; rostrum stout, moderately long, thickly punctate, longer and smoother 
in the 2, the antenne inserted behind the middle, the club acuminate-ovate. Prothorax smooth or 
faintly punctate, with some larger punctures along the basal margin and on the short anterior lobe, the 
base slightly depressed on each side of the median lobe. Scutellum transverse. Elytra subtriangular, 
depressed along the suture anteriorly, deeply striate throughout, the strize feebly punctate, the interstices 
smooth. Pro-, meso- and metapleura coarsely, sparsely punctate. Ventral segments very sparsely 
punctate, 1 deeply excavate in the middle in the ¢. Legs stout; femora shallowly sulcate beneath, 
unarmed; tibie broad, sharply denticulate along their inner edge, the intermediate and posterior pairs 
angularly dilated externally near the base and straight thence to the apex. 
Length 33-4, breadth 24-24 millim. (¢ 9.) 
Hab. Guatemata, Zapote (Champion) ; Panama, Volcan de Chiriqui (Champion). 
Five specimens, all but one from Panama. Easily known by the sharply denticulate 
inner edge of the tibie (the last tooth being about as long as the apical uncus) and 
the very distinctly striate elytra. D. tibialis, Boh., from Brazil, must be an allied 
form. 
2. Diorymerus denticulatus, sp. n. (Tab. XID figg. 12, 12a; 124, ant. 
tibia.) 
Globose-ovate, shining, black, almost glabrous. Head minutely punctate, with a distinct transverse frontal 
groove; rostrum very stout, about as long as the head and prothorax, sparsely punctate, the antennz 
inserted near the middle, the club ovate. Prothorax smooth, sometimes with scattered coarse punctures 
at the sides and along the anterior constriction, the base slightly depressed on each side of the median 
lobe. Scutellum transverse. Elytra rapidly narrowing from the rounded humeri, the sides forming an 
almost continuous outline with those of the prothorax; finely striate near the suture, the other strize 
obliterated (except at the base), the inner strive with scattered punctures. Mesosternal side-pieces with 
a few scattered very coarse punctures. First ventral segment broadly depressed down the middle in 
the ¢. Femora deeply sulcate beneath, unarmed. Tibize broad, finely and more or less distinctly 
denticulate along their inner edge (usually with a longer tooth near the apex), the anterior pair angularly, 
and the others acutely, dilated on their outer edge near the base, the anterior pair also dilated at 
the apex externally. 
Length 3-4, breadth 23-2,% millim. (d -) 
Hab. Muxico, Playa Vicente, Toxpam, Juquila (Sallé), Oaxaca (Hoge); BRivisy 
Howpvras, Rio Hondo (Blancaneaux) ; Guarumaa, San Juan, Teleman San Gerénimo, 
Zapote (Champion); Costa Rica, Azahar de Cartago (Underwood); Panama, Volcan de 
Chiriqui, Bugaba, Caldera, Taboga I. (Champion). 
A common insect in Central America, differing from D. serripes in its more globose 
form, shorter and stouter rostrum, obsoletely striate elytra, deeply sulcate femora, and 
more finely denticulate tibize. This last-ementioned character is somewhat variable, 
but one or more teeth are always present towards the apex of the tibia, in addition to 
the claw. ‘The elytral strie are sometimes scarcely traceable, except towards the base 
and suture. 
