"i THE UNITED STATES. I 



be distinguish d from Pterostichi by the third joinl of the antennae being rough and pub -- 

 cent, at least at its apes. The anterior tibiae are more or less incrassated at tip, and 

 usually slightly spinous : the thorax is truncate posteriorly, never pedunculated : the eh tra 

 are rounded, at tip or sinuate, and rarely truncate: tin- marginal stria is always normal in 

 its position. When the anterior tarsi of the males are dilated, the intermediate tarsi usually 

 show a similar structure. 



It is probable that in this group, as in the Platyni, the judicious study of more exten- 

 sive material than is afforded by one country will greatly diminish the number of genera. 

 The most important generic character seems to be found in the form of the ligula, winch 1- 

 fr< e at the apex, sometimes dilated, sometimes narrow : the paraglossas arc distinct, some- 

 times narrow, sometimes broad. Our genera may be divided into three group 



:i. Tarsi maris antcriores non dilal libus subfossoriis.) 



b. Tarsi maris antcriores dilatati, 



c. Tarsi maris antcriores prsecipue dilatati, Bubtua biseriatim papillosi. 



The first division contains Daptus and allied genera: the head is usually larg< r behind 

 the eyes, than in the other two divisions ; the anterior tibia? are more dilated and more 

 spinous, and the third joint of the antennae is less pubescent. Besides the e indicate 



n give no characters which will enable the genera placed here to be distinguished lr< m 

 those which follow. The table of relations is: 



Tib'uc anticie extus subden; .... 



Tibiae omncs apicc expansse - - - - - Gcopinus Lee. 



Tibia siraplices, mentum dentatnm - Cratacantb 



Tibire simpliccs, mentum non dentatnm. 



ram emarginatnm, tai i articulia 4 seqnalibus 



Labrum non emarginatum, tarsi poetici artii [ualibus /• '. 



Labrum non emarginatnm, tarsi postici art. I gradatim brevioribua iu Zim. 



Nothopus was formerly described bj me ( Inn.Lyc. I, 151) as Euryderus, which i 

 is preoccupied bj Laporte's Eurydera. Geopinus contains only Daj D 



M\ former genus Piosoma | Inn. Lye. 1,374.) Beems i ely allied to Cratogmathus, 

 that I have merged them togi thi r. Besidi C. etosus (the type of m\ genus] I have 

 another species from New Mexico, which, by the absence of B< is punctun -. r< cm- 



bles the South American species. I have named it: 



C. cor da t u s, piccus, thoracc subconlat 

 rectis, basi utrinque breviter impresso, elytria striatia ini 

 pauci3 imprcssis, antennis pedibnsque ferrngineia. Long. 



Of Agonodcrus, I have to observe, thai \. uturalis / . tan. I yc. 1, ■'■■'• i ; i dis- 

 torted specimen of A. in fu sea t u - Dej. 



DlSCODERl S '/'nil. 



Tin- genus was proposed to me by my friend Dr. Zimmermann, and contain- tv\" 

 cics; Selenophorus parallelus Hald. Proc. Acad. Vat. Sc. I- 302 and S. I u* Lte. 



