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 duplici, 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. 



Trachypachts 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. Eussl. p. 16, (note.) 



Trachypachus Holmbergi, Mann. Bull. Mosc. 1853. 



Two specimens, Shoalwater Bay, Oregon, Dr. Cooper. This interesting genus was founded 

 upon Blethisa Zetterstedtii Gyll., 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 



