364 ON THE PEDIPALPI OF NORTH AMERICA. 



The proximal end of tlie third joints is somewhat tumid, and has on its anterior face 

 several tuberculoid spinules. The hands are but little larger than the preceding artic- 

 ulation. Their faintly pronounced crests are not creiuilate. The movable finger is 

 somewhat longer than the fixed. The opposing surfaces are armed, with both 

 imbricated, obliquely longitudinal series of very minute tuberculoid teeth, and also a 

 pow of larger ones on either side. The sides of the body are generally fuscous, but 

 in some specimens, perhaps from the action of alcohol, they are of a much lighter tint. 

 The legs are light yellow, strongly compressed, more or less tuberculate, and provided 

 with crenulate lines. The tail in both sexes is much longer than the body. The 

 superior surface is broadly furrowed, but the penultimate segment, especially in the 

 male, often has the upjaer surface rounded, and the furrow obsolete. The four an- 

 terior caudal joints are protected on each side by superior, supero-lateral, infero-lateral, 

 and inferior minutely crenulate crests. The first has in addition to these a median 

 lateral. The penultimate segment is much longer than either of the othei's, and has 

 two supero and infero-lateral, with a single median inferior ridge. But in addition to 

 these, it often has the rudiments of the median lateral and lateral inferior. The 

 number of teeth composing the comb varies in the normal adult from 21-25. Beau- 

 vois originally described it, as possessing only eighteen. We have seen one or t\vo 

 with that number, but think they are i-edeveloped appendages. Mr. Girard con- 

 sidei'ed this species as the young of S. liacjtleatus. Although this at the first glance 

 apjjears somewhat plausible, yet the examination of a large suite of specimens has 

 convinced us that he is mistaken. We have seen a number of immature individuals 

 of /S'. liaculcaius all of which possessed the essential characters of the adult. The 

 geographical range of this species is very great. From the Southern Atlantic States, 

 it extends through Texas along that curious well-known belt of almost tropical animal 

 life into Southern Kansas, and perhaps still farther north. 

 Length of body d" | unc. ? unc. 1 tail d" unc. If ? unc. 1^. 



B. CALiFORNicus. — B. dilute olivaeeo-fulvus, fusco vitatus; cephalothoracc antico late seJ liauJ profuude 

 ' einarginato, medio valde canaliculato ; oculis lateralibus in serie recta positis ; palpis modice gra- 

 cilibus, marginlbus distincte crenulatis ; manibus modice tumidis ; digitis nonnihii elongatis et cur- 

 vatis; abdomine medio valde carinato, tuberculis parvis valde asperate; pedibus flavis, compressis, 

 proximis lineis elevatis vel crenulatis vel denticulatis impressis, ultimis pilosis ; pectinis deutibus 21 ; 

 Cauda nonnihii elongata, leviter crenulata ; spicule spinulo basali parvissimo armato. 



Scorpio {Alrcus) cali/urnicns, Girard, Marcy's Report. 



In our single specimen the cephalothorax is yellow and immaculate, with the ex- 

 ception of the eye spot. It is, howevei', bordered Avith black. Anteriorly it is slightly 

 emarginate. The surface is very rough, with the lateral grooves indistinct, but is 

 furnished posteriorly with a curved series of tubercles on each side. Each abdocuinal 

 scutum, save the last, has a well-marked curved series of tubercles on each side. The 



