1853.] 447 



One specimen. Resembles E. muricatum Say, but is longer and narrower, 

 with the broad margin of the elytra more suddenly reflexed and almost perpen- 

 dicular. Although so different in form, this genus is only distinguished from 

 Eleodes by the inferior plane of the mentum being more rounded and more deeply 

 impressed ; its anterior margin is slightly incised ; the lateral angles are so much 

 inflexed as to be invisible ; the tarsi are sulcate beneath, and fringed at the 

 apex and sides with short spines ; the middle joints of the posterior tarsi appear 

 more elongated than in Eleodes. I have great doubt of the generic value of any 

 of these differences, and several nondescript species from New Mexico seem to 

 be intermediate, both by the form of the body and by the differences in the 

 mentum. 



Lytta Linn. 



1. L. fulvipennis Lee, Proc. Acad. Nat. Sc. 6, 33, though smaller, does not 

 appear sufficiently different from L. c ar din alis Chev., Col. Mex. cent. 1. 



2. L- cribrata, atra, capite thoraceque nitidis, punctis paucis impressis, 

 illo macula frontali magna sanguinea, hoc lateribus sanguineis, rotundato, disco 

 bifoveato, vix canaliculato, elytris opacis lineis elevatis irregulariter reticulatis, 

 thorace fere duplo latioribus. Long. '11, 



One specimen. This species having the joints of the antennae oval, and the 

 labrum slightly emarginate, and the outer spur of the posterior tibiae obtuse, 

 belongs to division A c of my essay on this genus, (Proc. Acad. 6, 331 ;) the 

 outer joints of the antennae are hardly thicker than those near the base ; they 

 extend to about the anterior third of the elytra. L. reticulata Say (Journ. Acad. 

 Nat. Sc. 3, 305) must resemble this species, but is said to be entirely black, 

 tinged slightly with green. The antennae are said to be thickened towards the 

 tip, and the punctures of the thorax confluent posteriorly. 



3. L. morio, aira immaculata, confertim subtiliter punctata, brevissime 

 pubescens, thorace latitudine paulo breviore, subcanaliculato, angulis anticis ro- 

 tundatis, labro vix emarginato, tibiis posticis calcare externo paulo latiore. 

 Long. "4 53. 



This species resembles L. pensylvanica, but is larger and more robust, and 

 the thorax is wider; in form it precisely resembles L. fissilabris Lee, but the 

 labrum is very slightly emarginate, and the spurs of the posterior tibiae are not 

 equal. The head, as in L. pensylvanica, has a fine glabrous, longitudinal line. 



4. L. sublineata, elongata, nigra subtiliter dense punctulata, dense luteo- 

 griseo pubescens, thorace capite sesqui angustiore, latitudine paulo longiore, 

 lateribus parallelis antice rotundatis, disco late canaliculato, macula utrinque 

 denudata ad medium ornato, elytris minus dense pubescentibus, sutura, margine, 

 apice vittaque lata postice abbreviata densius griseo pubescentibus, lineis tribus 

 tenuissimis denudatis atris, tarsis palpis antennisque nigris, his articulo 2ndo 3io 

 paulo breviore. Long. 1-05. 



One female, with the first joint of the antennae extending to the posterior mar- 

 gin of the eyes. This fine species resembles L. immaculata and longicollis, but 

 the thorax is less convex, and the unequal distribution of the pubescence will 

 distinguish it. The posterior tibiae appear black, but I do not think that this 

 will be found to be a constant character. 



5. L. fulvescens, nigra elongata dense subtiliter pubescens, densissime 

 luteo-fulvo-pnbescens, thorace capite paulo angustiore, latitudine longiore, late- 

 ribus parallelis antice rotundatis, canaliculato, elytris thorace paulo latioribus 

 immaculatis, antennis tarsisque nigris, illis articulo 2do 3io fere a;quali, palpis 

 testaceis, apice nigris. Long. '59 68. 



Several specimens ; found also by Lieut. H. Haldeman in Texas. Resembles 

 L. longicollis, but is smaller and without any denuded humeral spot. By the 

 color of the palpi it also differs from all the allied species. The first joint of the 

 antennae extends a little beyond the posterior margin of the eyes in the male; in 

 the female it is a little shorter. 



L. ferruginea Say^ L. conspersa Lee- and L. immaculata Say, besides L. my- 



