DESCRIPTIONS OF NEW SPECIES. 145 



width, with the apical side a little shorter than the outer side, 

 and twice as long as the internal side which becomes basal, and 

 meets the apical side almost at right angles. The penultimate 

 joint of all the tarsi is cordate and somewhat lobed, and the first 

 joint of the hind tarsi is nearly twice as long as the others united. 

 Allopoda may be distinguished from Anaspis and its allies, 

 which have similar maxillary palpi and hind tarsi, by the last 

 joint of the labial palpi being transverse and securiform the 

 antenna? not being thickened externally by the anterior tro- 

 chantin being distinct, and by the different form of the hind cox, 

 which do not conform to the ventral surface, but are raised from it. 



TETRATOMA FABR. 



436. T. trimcorum. Lsete flavo-rufa nitida, capite nigro, punctato, 

 thorace subaeneo jfiicante, profunde punctato, elytris violaceis profunde 

 punctatis ; antennis totis nigris, palpis piceo-rufis. Long. -20 -27. 



Southern, Middle and Western States, and Canada. Precisely 

 resembles m form and sculpture the European T. fungorum, but 

 differs by the antennas being entirely black, while in that species 

 the joints 1-1 are testaceous. 



NOTHUS OLIV. 



437. HT. variaiis. Piceus vel nigro-piceus, cinereo-pubescens, capite 

 thoraceque subtiliter punctatis, hoc flavo, vittis duabus nigris ornato, 

 transverse, lateribus paulo rotundatis, angulis omnibus obtusis rotun^ 

 datis ; elytris confertim subtiliter rugose punctatis. Long. -20 -32. 



a. Antennis pedibusque piceis ; mandibulis et ore subtus pallidis, palpis 



fuscis. 



B. Antennarum basi ore pedibusque flavis. 

 Mas femoribus posticis curvatis, paulo incrassatis, tibiis posticis spina 



elongata ad dodrantem latere interno annatis. 



New York, Illinois, Missouri. Of the form a I have two 

 females ; of /3 one male and one female. 



PROTHALPIA LEC. 



438. P. undata. Elongata, subtus picea, supra testacea nitida pube. 

 suberecta minus subtili vestita, capite ftisco, punctato inter oculos trans-* 

 versim impresso, thorace latitudine sesqui latiore, semicirculari, con- 

 fertim punctato, plaga media margineque laterali infuscatis, postice late 

 breviter canaliculate et utrinque impresso, basi bisinuata et medio 



March, 1866. 



