428 REVISION OF THE ELATERID^ 



A specimen from Pennsylvania, which I consider as the male of this species, has the 

 sides of the thorax perfectly straight, the posterior angles scarcely diverging, and the an- 

 tenna? longer than the head and thorax. It is much smaller than the female, (-38 unc.,) 

 and darker coloured. In this and the next species the second and third joints of the an- 

 tenna? are equal, and, together, not longer than the fourth. 



4. A. bicolor, supra ater, pube erecta nigro-grisea vestitus, thorace latitudine fere sesqui lon- 

 giore, (antrorsum angustato, lateribus paulo rotundatis,) confertim punctato, angulis posticis piceis sub- 

 divaricatis, elytris striis tenuibus punctulatis, interstitiis confertim rugose punctulatis, subtus casta- 

 neus, antennis pedibusque testaceis. Long. *35. 



One specimen found at New York. It is a female, having the antenna? as long as the 

 head and thorax. 



Pityobius Lee. 



Frons producta, profunde exeavata ; mandibula? apice emarginata? ; antenna? elongatse 11-articu- 

 lata?, maris bipectinata?, femina? subserrata?, articulis 2 et 3 minoribus, illo minore, ll mo simplici; pres- 

 ternum antice lobatum, postice mucronatum, lateribus rectis, antice subexcavatis; mesosternum non 

 protuberans: coxa? postica? laminis angustis intus sensim paulo latioribus, non dentatis: tarsi articulo 

 l mo elongato, sequentibus duobus a?quali, apice subtus spongioso, 2 — 4 sensim brevioribus subtus bre- 

 viter lobatis, 5 l ° longiore tenui, unguiculis simplicibus. 



The body is long and parallel, not convex; the thorax without basal fissures, with the 

 posterior angles acute, produced and diverging, and marked with an indistinct carina pa- 

 rallel to the margin. 



1. P. an guinus, piceo-niger, tcnuiter pubescens, thorace confluenter punctato, profunde cana- 

 liculato, antice utrinque profunde foveato, angulis posticis elongatis, divaricatis obsolete carinatis, 

 elytris striis profundis, valde punctatis, interstitiis convexis subtilius punctatis. Long. -8 — 1-0. 



This fine species is found in pine forests, but is rare: my specimens came from the 

 Southern States, but Dr. Harris has found it in New Hampshire. The late Mr. Melly sent 

 me, under the name Calocerus nigcr, (Westwood,) two males, found in turpentine. I have 

 substituted for the specific name that under which it appears in Dejean's catalogue, and 

 have been compelled to change the generic name, as being applicable to but one sex. 



Limonius Esch. 

 This genus differs from Athous in having the first and second joints of the tarsi equal 

 or hardly different in length; the fourth is not suddenly smaller than the third, and none 

 of the joints are lobed or spongy beneath. Our species are difficult to distinguish, as they 

 approach very closely in external characters; they may be grouped as follows: 



A. Presternum sutura laterali antice exeavata: 



a. Clypeus valde emarginatus ..... Sp. l — 2. 



Clypeus late vel vix emarginatus ; 



p. Antenna? articulis 2 et 3 parvis, pedibus nigris - - - Sp. 3 — 4. 



y. Antennae articulis 2 et 3 coniunctis 4 tn maioribus, pedibus rufis Sp. 5 — 11. 



5. Antenna? articulis 2 et 3 parvis, pedibus ilavis - - - Sp. 12 — 13. 



P>. Presternum sutura laterali vix exeavata .... Sp. 14 — 25. 



