222 The Species of Amblychila. [ZOE 
Cylindriformis Say (not of Thomson) is closely punctured all 
over the elytra with large and small punctures on a rugulose 
ground. /%rcolominii and Baroni have but few punctures, far 
apart on a smooth ground and flat surface. The number of 
punctures in each species should be noticed: in cylindriformis 
there are about 230—240 on the central or sutural line and near 
the suture there are about 40. In P2colominii the whole number 
in the same area does not number over 40, while near the suture 
there are but three or four. On the deflexed portion of the 
elytra and covering the apex, large punctures occupy all avail- 
able space. On the same part in the other species the apices are 
smooth. 
Cylindriformis, Picolominii, 
_ Length, 30 m.m.; color, brown- Length, 25 m.m.; color, deep 
ish; surface of elytra rugulose and black; surface of elytra smooth and 
irregularly punctate; apex of elytra regularly punctate; apex of elytra 
very coarsely punctured. with punctures scarcely visible. 
Locality Peach Springs, Truxton Valley, N. W. Arizona. 
Altitude, 5000 feet. 
and its western tributaries seem to be the habitat of Picolominie. 
The original statement that it was found near the Port and Bay 
of San Francisco, in New California, is presumably a mistake. 
Sgests such a course is the fact that 
Baroni was found on the Gila and the Prcolominii on the Colorado, 
and possibly Picolomini took his example a 9 in the San Fran- 
cisco Mountains. 
The original description of 4, Picolominié is appended. 
AMBLYCHILA PICOLOMINIT Dupont Collection. 
146.) 
Longueur 28 millim, largeur, 9 millim, a 
Ater, nitidus; capite levigato; thorace subgquadrato, levigato Subcanaliculato; 
elytris obsolete punctulatis, linets tribus elevatis; interstitiis puncte profunde 
impressis, : 
(Voyez Pl. rg, fig. 
