CBNTJRUEOIDES. 



29 



carapace, moderately stout, fourth segment twice as long as wide, and about as long as the carapace, the 

 intercarinal spaces almost smooth, the sides and under surface of the fifth segment closely but weakly 

 granular ; all the crests normal, with pearly granulation ; upperside of fifth higher than its superior lateral 

 keel ; no trace of median lateral keel on second segment ; vesicle granular, with triangular subaculear 

 tooth close to base of aculeus. Ghelce finely and closely granular or coriaceous ; normally keeled ; hand 

 narrow, a little wider than brachium, the three finger-keels on its upperside evenly granular or crenulated, 

 the external weak, the rest of the hand smooth ; the underhand about half the length of the movable 

 finger, which has a low basal lobe and eight rows of teeth. Pectinal teeth 20-22. 

 c? • Tail about six and a half times as long as carapace, which is considerably more than half the length of the 

 sum of its first and second segments, and almost equal to the third ; second segment slightly more than 

 twice as long as broad, fifth about three times as long as wide, slightly higher than wide, with rounded 

 superior lateral edges, the dorsal surface rising well above the weakly granular keel ; vesicle evenly oval 

 when viewed from below, without trace of lateral projection forming shoulder-prominence at base of 

 aculeus. Chelce much longer and stouter than in female ; width of hand much exceeding that of brachium, 

 length of underhand much more than half the length of the movable finger. Pectinal teeth 22. 



Measurements 



2 . Total length 62, tail 37, carapace 6'7 ; width 



d 



length 4-2 ; width of fifth 2*8, length 7. 6 • Total length 69, carapace 7, tail 46 ; length of second 

 caudal segment 7, width 3 ; length of fifth 9, width 3. 



Eab. Mexico, Jalapa 1 (Edge). 



. 



L 





L 















' 





_ 







■ 







. 



■ 



















' 































■ 





■ 













■ 









■ 



■ 









■ 













: 



Kraepelin 2 pi 



C. flavopictus 



ty to C. margaritatus, doubtin 



apparently its specific distinctness ; and Borelli [Boll. Mus. Torino, xiv. no. 338 

 (1899)] goes a step further and declares it to be based upon the young of that sp 



an opinion which he supports by the presence of a pal 



lateral marginal spots in the young forms of the latter. 



3 narrow median band and 

 This view, however, is quite 



■g 



untenable. When describing C. flavopictus I was well acquainted with the chara 

 of the immature C. margaritatus and with the features in its coloration that Dr. B 

 mentions ; but no specimens of C. margaritatus, whether young or old, that I have 

 resemble C.flavopictus in having the basal half of the finger black, and contra 

 forcibly with the pale yellowish-red hand, which is also much paler than the brachium. 

 In C.flavopictus, again, the granulation is much finer, and there are no traces of coarse 

 lineally arranged granules on the carapace ; there are also differences in the number of 

 pectinal teeth, the form and size of the 



male, and the gran 

 specimens of the sp 

 sexual characters. 



subaculear tooth and of the vesicle in the 

 of the hand-keels. Lastly, the adultness of the typical 

 attested by the development of well-marked secondary 



,' 



9. Centruroides ochraceus. (Tab. VI. figg. 7, 7 



d* $ 



Centrums 



ochraceus, Pocock, Ann. & Mag. Nat. Hist. (7) i. p. 386 (1898) l ; Kraepelin, Das 

 Tierr., Scorpiones et Pedipalpi, p. 94 (1899) 2 . 



2 . Colour : upperside of trunk a deep uniform yellowish-brown ; tail, legs, and chelae uniformly ochre-yellow. 

 Carapace and terga studded with coarse granules, which are arranged on the former in definite series 

 and on the latter in the usual way, the lateral keels being apparent on all but the first and second 

 tergites. Sterna smooth, third with only a few coarse punctures, fourth with weak crests, fifth very finely 

 granular laterally, the four keels smooth, the laterals at most crenulate. Tail about five and a half times 

 as long as carapace, which is equal to its fourth segment in length ; third segment twice as long as wide, fifth 



* « 



■ 













. 



■ 







■ 













