224 [December, 



nato, elytris thorace latioribus, postice declivibus et acuminatis, margine sutura 

 costisque utrinqne tribus acute elevatis (interna paulo breviore). Long. -6. 



San Diego trip, one specimen. Of the form of E. o p a c a ; the marginal costa 

 extends to the tip of the elytia, the inner discoidal one ceases at one-third, and 

 the other two at one-fourth from the apex. 



Euschides convexicollis , niger nitidus, thorace convexo medio obsolete 

 ad latera discrete punctulato, lateribus tenuiter marginatis, rotundatis, angulis 

 omnibus obtusis baud prominulis, basi rotundata, elytris obovatis, lateribus hauj 

 marginatis, apice valde declivibus et obtuse acuminatis, disperse punctulatis et 

 parce subtiliter rugosis. Long. -63 -85. 



Durango, Chihuahua, Copper Mines, Los Organos, and at Camps 5, 6 and 7. 

 This species is of the form of E. obovata Lee. (Ann. Lye. 5, 127,) but is very 

 different by the convexity ot the thorax, which is only very finely margined : the 

 thorax varies inform, being sometimes nearly one half wider than its length, but 

 in general the two dimensions are equal. In the male the elytra are one half 

 wider than the thorax, in the female about twice as wide. 



Epitragus submetallicus, piceus seneo-micans, fusco-pubescens, thorace 

 latitudine vix breviore antrorsum subangustato et lateribus rotundato, basi bi- 

 sinuata, angulis po3ticis rectis, dorso.parum convexo sat punctato, elytris thorace 

 duplo latioribus humeris oblique rotundatis, subtilius densius punctatis, punctisque 

 maioribus obsolete striatis. Long. -66. 



San Diego trip, one specimen. Much larger than E. canaliculars, with the 

 sides of the thorax rounded in front and parallel behind the middle : the outer 

 striae of the elytra are almost entirely effaced, those near the suture may be dis- 

 tinguished by the rows of larger punctures. The head is coarsely and thickly 

 punctured, and inside of the superciliary ridge on each side is a moderately deep 

 jongitudinal frontal impression. 



Cysteodemus cancellatus. Meloe cane. Brandt, and Er. Nov. Act. 16, 141 ; 

 tab. viii. fig. 9. 



Los Organos, Camp 7, and San Diego trip. The variety figured by Erichson 

 has an unusual amount of red upon the elytra : that color generally forms an 

 irregular vitta, with diverging and anastomosing branches. It is closely allied 

 to C. vittatus Lee, but is larger, with the thorax more transverse, and the 

 elytra more unequal. The back part of the head is frequently of a dull san- 

 guineous color, and the same variation is also found in C. vittatus. 



Lytta atririttata, nigra, subtus pube cinerea fasciata, supra dense 

 eiaereo-pubesceri-s, capite maculis magnis posticis duabus atris, thorace latitudine 

 longiore, canalicular, maculis duabus disci magnis atris, lateribus ante medium 

 rotundatis, elyiris thorace plus sesqui latioribus vittis utrinque duabus latis atris 

 ad apicem coniunctis, antennis palpis tibiis tarsisque nigris. Long. 1-05. 



One male, San Diego trip. This very fine species belongs with L. longicollis and 

 sublineata, which it equals in size; the antenna? are of a brilliant black, the first 

 joint extends beyond the occiput, is slender at base, very much curved beyond 

 the middle, and much compressed and dilated, with a large shallow impretsion 

 on its anterior face near the apex ; the second joint is thick and obconical ; the 

 third is two-thirds smaller, and the fourth again larger, so that together they are 

 longer than the second ; the fifth and following are almost equal in length to the 

 third and fourth united, and are progressively narrower. The under surface of 

 the body is black, with all the sutures broadly pubescent with dense cinereous 

 hair ; the under surface of the femora is also similarly clothed. 



Asclera n all i d a, elongata, testacea dense pallide pubescens, thorace obo- 

 vato capite vix latiore, obsolete canaliculato latitudine paulo longiore, pone 

 medium arjgust.-Uo, lateribus antice rotundatis postice subsinuatis, elytris paulo 

 latioribus cyhndricis. lineis utrinque tribus obsoletis densius pubescentibus, anten- 

 narum articulo lmo 3io paulo longiore. Long. *31 -38. 



San Diego trip : the pubescence is so dense as almost to conceal the punctures 



