108 RHYNCHOPHORA. 
have reached us from Cordova and Zapote. In the former the form P. reticulatus 
prevails, in the latter P. rugulosus, but neither series is referable solely to one or the 
other species. The width and sculpture of the prothorax and the structure of the 
elytral processes are all inconstant. PP. rugulosus is, on the whole, the commoner 
form. 
P. emarginatus is a smaller insect, with the apical processes of the elytra more deeply 
emarginate. It is probably varietal, and is not represented in our collection by any 
specimen save the original type from Toxpam. | 
88. Platypus rotundatus. 
Platypus rotundatus, § 2 (lege 2 8), Chap. Mon. Plat. p. 195, fig. 105 - 
Hab. GuatEMALA, Yzabal (Sallé 1). 
The male at least of this species is distinct enough, but it is probably an aberration 
of P. dejeani or P. rugulosus. No examples, save the types, are in our collection. 
34. Platypus cribricollis, sp.n. (Tab. IV. figg. 18,3; 18a, apex of elytra.) 
Mas. Piceus; prothorace quadrato, in utroque sulci latere poro ornato, forte conferte areolato-punctato ; 
elytris sulcatis, postice in processus trispinatos productis, interstitiis rimose punctatis, punctis pro 
maxima parte in sulcos conjunctis, 1°, 3°, 5°, 7° versus apicem tuberculatis. 
Long. 3°5 millim. 
Male. Piccous, the mouth, antenne, and legs ferruginous. Front slightly concave, rugose and finely areolate, 
with a median impressed point. Prothorax quadrate, the sulcus short, abbreviated behind and preceded 
by a subelevated punctured line; at its anterior extremity are two rather small pores ; surface covered 
with close, variolose, oblong, or substrigose punctures. Elytral sulci rather wide, irregularly punctured 
or reticulate, interstices elevated, 1st narrow, subcostate and impunctate throughout, 2nd and succeeding 
sriterstices with series of strong oblong punctures, more or less confluent, so that they appear sulcate for 
part of their length, the 3rd widened, shining, and more finely punctured at base; interstices obliquely 
declivous at apex, the Ist, 3rd, 5th, and 7th elevated and tuberculate, the lst and 3rd more strongly ; 
apical processes of the elytra broader than long, triquetrous, somewhat emarginate at apex, the external 
point slightly the longest, the inferior the shortest, and situated nearer to the superior than to the 
external point. 
Hab. Panama, Bugaba (Champion). 
This species, of which two examples were taken, cannot be assigned to any existing 
subdivision of Chapuis’s division V., Platypi trispinati, to which it undoubtedly belongs. 
It must therefore be placed in a separate subdivision characterized by the presence of 
prothoracic pores in the male and by the subsulcate elytral interstices, which are 
rugose and tuberculate towards the apex. In one of the two specimens the prothoracic 
pores, clearly visible in the other, are barely to be traced even under the microscope. 
The relative size and position of these structures is apparently not a safe guide towards 
the differentiation and diagnosis of the species of this division. 
