482 REVISION OF THE ELATERID.E 



The latter division differs from Cryptohypnus, by the presternum not being dilated in 

 the middle, by the tarsi not being furnished with long bristles, and by the coxal plates being 

 less dilated. 



A. Tarsi articulo 4 t0 loho dilatalo instructo. 



1. M. livid us, fuscus pube densa pallide cinereo-fusca vestitus, thorace elongato, antrorsum an- 

 gustato, lateribus late rotundatis, angulis posticis divergentibus, elytris striis punctatis, antennis tes- 

 taceis, pedibus pallidis. Long. -5 — -7. 



Elater lividus De Geer, Ins. 4, 162; tab. 18, fig. 13. 



Elater castanipes JHerbst, Kafer, 10, 23; tab. 160, fig. 5. 



Elater hiatus Say, Journ. Acad. Nat. Sc. 3, 175; Trans. Am. Phil. Soc. 6, 174. 



Monocrepidius lobatus Germ. Zeitschr. 1, 228. 



Middle and Southern States. De Geer's figure and description cannot possibly refer to 

 any other North American species: in a report upon the Coleoptera described byBeauvois, 

 by M. Chevrolat, (Ann. Ent. Soc. France, Sept. 1852,) the name of De Geer is given to 

 Elater elongatus Beauv., a species mentioned as occurring in Hayti: as, however, De 

 Geer states that his specimens came from Pennsylvania, it is obviously imprudent to ap- 

 ply his specific name to a West Indian species, until specimens from different localities 

 have been compared, and their identity fully shown. The female is larger and more robust 

 than the male, and has the sides of the thorax more rounded anteriorly. Germar places 

 this among the species that have the elytra armed with an apical spine, but there is no such 

 character to be seen in any of my specimens. 



2. M. a vers us, fuscus, elongatus, pube densa subcinerea brevissima vestitus, thorace infra flavo- 

 marginato, elongato, lateribus vix rotundato, basi flava, angulis posticis non divaricatis, elytris striis 

 punctatis, scutello, antennis, pedibusque flavo-testaccis. Long. -36. 



Georgia, rare. The body is entirely, finely and densely punctulate, as in the preceding 

 species; the pubescence is very short and depressed, hardly altering the general colour of 

 the insect. 



3. M. suturalis, fuscus, tenuiter cinereo-pubescens, thorace testaceo, linea dorsali fusca, elon- 

 gato, lateribus late rotundatis, punctato, elytris parallelis, testaceis, vitta communi suturali ad basin 

 et versus apicem latiore, margineque pone medium fuscis, striis punctatis, interstitiis subtilissime punc- 

 tulatis, antennis pedibusque flavis. Long. -27. 



A specimen from Alabama, communicated by Dr. Harris, under the name adopted. 

 This species is very distinct from the two preceding by the distinct punctures of the tho- 

 rax. The head is fuscous, with the palpi and antennae pale yellow. The under surface 

 is fuscous, with the exception of the feet, the anterior margin of the prostcrnum, and the 

 inflexed portion of the prothorax, which are testaceous yellow. 



B. Tarsi articulo 4 l ° loho an gusto, (frons convexior.) 



4. M. s o r d i d u s , fuscus pube subtili sordida dense vestitus, thorace elongato, convexiusculo, la- 

 teribus late rotundato, punctato, angulis posticis pallidioribus subdivergentibus, elytris striis punctatis, 

 interstitiis vix subtilissime punctulatis, antennis articulo 3 io 2"' 1 " longiore, testaceis, palpis pedibusque 

 flavis. Long. -31 — - 37. 



