PLATYPUS. 108 
24. Platypus alternans. 
Platypus alternans, ° (lege 3), Chap. Mon. Plat. p. 156, fig. 71’. 
Hab. Mexico, Omilteme in Guerrero (H. H. Smith).—VENEZUELA 1, 
I refer to this species a single example, identified by the description alone. With 
this it agrees so completely as to make a separation of it impossible unless after 
comparison with the type. Nevertheless no example has been taken by Mr. Champion 
or other collectors in Central America south of Mexico. . 
25. Platypus longulus. 
Platypus longulus, 2 (lege 3), Chap. Mon. Plat. p. 158, fig. 73°. 
Hab. Mexico, Toxpam (Sallé'); Guatemata, Purula and Chiacam in Vera Paz 
(Champion). 
We have four typical examples from M. Sallé’s collection, and one specimen was 
obtained at each of the localities in Guatemala. The female has not yet been 
recognized. 
96. Platypus porosus, sp.n. (Tab. IV. figg. 16, prothorax, ? ; 16a, pro- 
thoracic pores.) 
Angustus, piceus, subtus dilutior; fronte infra nitida, supra rudi; prothorace oblongo; elytris punctato- 
striatis. 
Mas. Interstitiis elytrorum postice gradatim declivibus, alternis, preecipue 3°, elevatis et tuberculatis, processu 
postico subcylindrico, latitudine longiore, oblique declivi. 
Long. 3°8 millim. 
Fem. In utroque sulci prothoracici latere impressione ovali, poris usque ad quatuor munita; angulo postero- 
laterali elytrorum haud prominulo. 
Long. 4 millim. 
Slender, narrow, piceous, the limbs and underside ferruginous. Front furrowed longitudinally, and with a 
short, impressed, shining, median striga, its surface dull, subimpunctate, over the mouth shining and 
transversely punctured. Prothorax oblong. LElytra punctate-striate. 
Male. Prothoracic punctuation moderate. Striz of elytra distinct; interstices flat, subimpunctate, base of the 
3rd, 4th, 5th subtuberculate ; 1st, 3rd, 5th, 7th, 8th, 9th carinate and obliquely declivous towards apex, the 
3rd more elevated; the declivous portions serrate, with piliferous tubercles ; apical processes obliquely 
declivous, longer than broad, subcylindric, but narrowed towards the truncate tip. 
Female. Prothoracic punctuation fine, closer on either side of the middle line before the sulcus and round the 
emarginations ; anterior extremity of sulcus with an oval impression on each side bearing one to four 
asymmetrical pores. Elytral stris shallow, deeper at base; interstices flat, with very fine sparse punctua- 
tion, setose and rough towards apex ; apical surface separated above by a shallow impression, subconvex, 
with piliferous tubercles, its lateral angles rounded. 
Hab. Panama, Volcan de Chiriqui (Champion). 
One male and two females of this species were taken by Mr. Champion in Panama. 
The female is easily distinguished by its longitudinally-furrowed forehead and by 
possessing more than one pore on either side of the prothoracic sulcus. One example 
has four pores on one side and three on the other, the latter arranged in a straight 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 6, January 1896. PP 
