ASTACID^. 49 



ad marginem anticum utrinque impressa, postice latiori, calloso-inflata ; 

 margine thoracis postico sinuato. Postabdomine thorace longiori, lato, 

 subcompresso, parce-punctato, segmentis antepenultimis angulis late- 

 ralibus fere rectis ; lamina media parte basali apice utrinque bispinosa 

 (interdum trispinosa), parte apicali breviori, angulis rotundatis. Pedi- 

 bus anticis longis, validis ; chela longa, lata, subdepressa, ubique tuber- 

 culis majoribus obtusis, subtus rarioribus, margine interno subrecto, 

 fortiter dentato; digitis vix brevioribus, planis, subcostatis, jmnctato- 

 ciliatis ; digito interno recto, sublongiore, utrinque dentato ; externo 

 incurvo, intus dentato, dente anteapicali majori. Carpo longo tuber- 

 culato, extus nudo, spina media interna valida; subtus spinis duabus 

 apicalibus validis, intus bi-vel triseriatim spinoso ; brachio longo, mar- 

 gine supero tuberculato, spinis duabus anteapicalibus acutis, subtus 

 spinis biseriatis, anticis utrinque ad articulationem validis. Pedibus 

 tertiis et quartis articulo tertio unguiculato ; pedibus quartis et quintis 

 capitulo basali, quartis ovato majori, quintis minori, laminato, erecto. 

 Pedibus abdominalibus validis, apice paululum divisis, parte externa 

 ante apicem angustiori, apice extus barbata, dentibus duobus fusco- 

 corneis incurvis, supero longiori; parte interna fusiformi, apice spina 

 longiori, gracili, subrecta, partem externam non superante. 



Forma II. differt chelis minoribus, minus tuberculatis ; unguiculis 

 articuli tertii minoribus ; pedibus abdominalibus basi articulatis, parte 

 interna fortiori, spina apicali mobili, extus curvata; parte externa 

 apice dentibus conicis, nee fuscocorneis, subincurvis ; capitulo basali 

 pedum posticorum minus expresso. 



Femina differt antennis brevioribus, chela minori ; ventre inter pedes 

 quartos lsevi, postice utrinque tuberculo compresso ; annulo transverso, 

 sulco antico longitudinali, lumine transverso, profundo, postico. 



(Maxim.) Long. corp. 3.6 ; antenn. 3.3 ; ped. antic. 3.2. 



Habitat : Athens, Georgia ; Roswell, Georgia. Vidi multa specimina. 



The females from Roswell differ a little in having the venter be- 

 tween the fourth legs not so much tuberculated, and the annulus less 

 open. The males (Forma II.) seem to be identical. 



I have seen the male type, Forma II., in the Mus. Philadelphia. 



Cat. No. 172, Athens, Ga., Dr. J. LeConte. Male Form I, Fem. 

 Spec. 12 * 



Cat. No. 222, Roswell, Ga., Mr. N. A. Pratt. Male Form I., Fem. 

 Spec. 5. 



