512 STAPHYLINID A. 
Though a close ally of C. collare, this species is readily distinguished by the colour 
and the narrower form, as well as by the differences of sculpture expressed in the 
diagnosis. It was labelled “C. palustre, E. Dugés,” in Sallé’s collection, and I have 
preserved this name. 
11. Cryptobium ferrugineum. 
Subdepressum, sat latum, ferrugineum ; pedibus testaceis ; capite opaco, suboblongo, sat crebre, minus profunde 
punctato; prothorace minus crebre punctato, medio late longitudinaliter levigato; elytris sat fortiter, 
dense, profunde punctatis, subrugosis. 
Long. 12 millim. 
Hab. Mexico, Oaxaca (Hoge). 
Though very similar at first sight to C. palustre, this species has much denser 
punctuation on the elytra, and on the head a more distant and obsolete punctuation, © 
and it has also a shorter thorax. The male has an elongate setigerous line on the 
third ventral plate, and on the next segment a transverse area bearing some delicate 
pubescence; this segment, too, is produced behind so as to form a long, somewhat 
narrow lobe. The female has no positive sexual marks. I have seen only one pair of 
the species. 
12. Cryptobium luridum. 
Subdepressum, sat latum, ferrugineum, opacum; thorace nitido; capite subquadrato, peropaco, crebre, minus 
fortiter, haud profunde punctato; thorace crebrius punctato, medio minus late longitudinaliter levigato ; 
elytris dense, ad basin sat fortiter, ad apicem obsolete, punctatis, subrugosis, vix nitidis. 
Long. 12 millim. 
Hab. Mexico, Oaxaca (Hége), Yantepec, Morelos (Flohr, coll. Sharp). 
This is a species with large eyes and slender antenne; the head is quite dull, and its 
punctuation rather fine. The thoracic punctuation is scanty at the base; that of the 
hind body is quite sparing. From C. palustre and C. ferrugineum the species is readily 
distinguished by the more quadrate head, and by the much finer punctuation on the 
apical portion of the elytra. The male has a short space on the third ventral plate 
giving out two pencils of sete, a rather small circular setigerous fovea on the next 
segment, and the hind margin of this latter produced to form an extremely broad, 
rather short, lobe; the female has no positive sexual marks. 
13. Cryptobium terminatum. 
Sat latum, rufum ; pedibus flavis, abdominis segmentis duobus ultimis nigris; capite, thorace elytrisque crebre: 
fortiter punctatis. 
Long. 124 millim. 
Hab. Mexico, Pinos Altos in Chihuahua (Buchan-Hepburn). 
Head scarcely so broad as the elytra, closely and coarsely punctate, shining in front, and 
there more sparingly punctate. Thorax a good deal narrower than the elytra, closely, 
