42 ASTACID^. 



impressa. Postabdomine snbangustiori, lasvi ; segmentis penultimis 

 angulo externo obtuso ; lamina media parte apicali vix breviori, antice 

 subrotundata ; parte basali apice sinuata, utrinque bi-(vel tri)-.spinosa. 

 Pedibus anticis elougatis, corpore vix brevioribus ; cbela longa, crassi- 

 ori, squamoso-tuberculata, margine interno longo, su1)recto, densiiis 

 tuberculato et fortiter dentato ; digitis paulo longioribus, arcuatis, sub- 

 costatis, leviter punctato-lineatis, apicibus acutis, incurvis ; intus apice 

 squamosis, basi serratis ; digito externo tuljerculo medio et basali inter- 

 nis majoribus obtusis ; digito mobili sublongiori, basi sinuata, tuberculo 

 majori. Carpo longo, l^evi, intus subtuberculato, spina media interna 

 majori ; subtus spinis duabus anticis majoribus. Bracbio rostro longiori, 

 extus b^evi, intus ante apicem tul:)erculis nonnullis minoribus; margine 

 supcriori leviter tuberculoso, spinis duabus majoribus oblique positis ; 

 subtus biseriatim spinoso, spinis apicalibus validis. Pedibus tertiis et 

 quartis articulo tertio unguiculato ; pedibus quartis capitulo basali, 

 latiori ; quintis lamina quadrangulari, parva elevata. Pedibus alxlomi- 

 nalibus brevibus, rectis, parte interna intus lata, plana, spina media 

 posteriori, apice bifida ; ramo antico brevi, fusiformi, acuto ; ramo postico 

 longiori, laminato compresso ; parte externa cylindrica, valde bi-attenu- 

 ata, dente apicali brevi, fusco corneo, triangidari. 



Forma II. differt cbelis brevioribus, unguiculis pedum minoribus; 

 pedibus abdominalibus basi articulatis, parte interna ramo interno fere 

 obtuso ; parte externa dente apicali minori nee fusco corneo ; sj)ina 

 thoracis laterali interdum distincta. 



Femina differt antennis chelisque brevioribus, minoribus ; ventre 

 inter pedes tertios tuberculato, inter pedes quartos nudo ; annulo 

 obovali, fissura longitudinali, dentibus alternis, modice inflatis ; annulo 

 mobili, nee ventre prajcedenti connate. 



Long. 3. Mas maximus ; long. 3.8; ped. ant. 3.7; antenn. 3.5. 



Patria : Charleston, South Carolina; Lawn Ridge, IlUnois; Rocky 

 River, Olmsted, Ohio ; Georgia. 



(Habitat in Georgia3 oryzaceis, ubi spiracula 4 unc. alta format. 

 LeConte.) 



I have seen many very young specimens O.G inch long. 



From Georgia I have seen but four specimens, two males (Forma I.), 

 and two females. The first abdominal legs in the male are a little 

 difterent in shape. The tip is more recurved, not straight as in the 

 others. Apparently this is the veritable A. troc/lodijtes LeC, and the 

 intermediate lamina is always trispinose. 



A. iroghdf/tes male type LeConte (Mus. Philad.), with the dimensions 

 given by Mr. LeConte, is identical with tlie males from Charleston. 

 The abdominal legs are (Forma I.) similar ; the lamina ia trispinos^, 



