INSECTS COLEOPTERA 
31 
merely individual. One of the characters mentioned by Eschscholtz, that the spaces between 
the rows of punctures of the elytra are alternately more elevated, seems liable to variation : in 
one specimen it is seen ; in another, the middle interval in each space between the catenated 
rows appears a little broader than those next the elevations ; but in the other specimens no dif- 
ference in breadth or elevation can be perceived. 
C. discors, apterum, minus elongatum, nigrum, thorace brevi, valde intricato-rugoso, lateri- 
bus valde rotundatis^ margine subdepresso, basi emarginato, medio truncato, elytris ovalibus 
thorace paulo latioribus, confertim substriatis, striis interstitiisque uniseriatim punctatis, 
foveisque obsoletis serie triplici impressis. Long. •'75 — "82. Tab. I, fig. 9. 
San Francisco, Mr. Child ; Sacramento, Mr. J. Wittick. This species, by its short robust 
form, and by the absence of wings, simulates Callisthenes, but the antennae are as in other 
species of Calosoma. 
Body black, without metallic lustre. Head elongated, rough with confluent wrinkles and 
punctures ; antennae with the third joint strongly compressed, twice as long as the fourth, 
fifth and following joints entirely pubescent. Thorax more than twice as wide as the head, 
and fully twice as wide as its length, not convex, margined, with the sides somewhat depressed 
behind, but not reflexed ; base transversely impressed, and faintly bifoveate ; middle part 
truncate, posterior angles moderately produced, hardly acute at apex. Elytra oval, moderately 
convex, a little wider than the thorax, marked with faint approximate striae, which are strongly 
punctured ; the narrow interstices are also marked, each, with a row of punctures equal to those 
of the striae ; in certain lights three rows of very indistinct foveae may be seen in the usual 
position. 
NoTioPHiLUs Dumeril. 
N. nitens, aeneus, fronte multistriato, thorace transverso, quadrato, postice vix angustato, 
toto subtiliter rugoso, limbo late punctulato, elytris stria scutellari duj)lici, suturali dorsali- 
Dusque septem remotis subtilibus punctatis, (duabus externis fere obliteratis,) externa ad apicem 
exarata, et cum suturali iuncta, interstitiis nitidis, tertio fovea ante medium duabusque versus 
apicem impresso, antennis basi testaceis. Long. •21. 
One specimen. Prairie Paso, Oregon, Dr. Cooper. The punctures are much finer than in 
any of the species known to me from the Atlantic States, and the thorax is less narrowed towards 
the base. The striae are not impressed as in N, sylvaticus, but are merely rows of punctures. 
Trachypachys Motsch. 
T. inermis, nigro-aeneus, oblongo-ovalis, capite aequali, fronte lateribus marginato, thorace 
transverso, lateribus antice rotundatis, postice transversim impresso et uniseriatim punctato, 
utrinque profunde foveato, et extrorsum subcarinato, elytris seriatim punctatis, ad latera et 
apicem laevibus. Long. -2. Tab. — fig. 10. Motsch. Carab. Russl. p. 16, (note.) 
Tradiypaclius Holmhergi, Mann. Bull. Mosc. 1853. 
Two specimens, Shoalwater Bay, Oregon, Dr. Cooper. This interesting genus was founded 
upon Blethisa Zetterstedtii G^'siW. , a. rare insect of northern Europe. From the rarity of this 
species, authors who have not had an opportunity of examination have much mistaken the 
haracters of the genus. So far from being allied to Blethisa, it has the anterior acetabula 
