Scorpions from Cenb-al and South America. 385 



a broad fuscous patch relieved by the pale keel and a pair of 

 yellow spots ; sterna rather thickly clouded with fuscous ; 

 lower side of tail clouded with fuscous, more thickly at the 

 posterior end, the lower side of the fifth segment being mostly 

 black ; sides of tail also clouded with black, vesicle almost 

 wholly infuscate, aculeus pale ; chelee and legs mostly yel- 

 lowish red, indistinctly mottled, digits black, with flavous 

 tips ; coxai of legs pale. Upperside of trunk weakly 

 granular in the intercarinal spaces ; lower side of abdomen 

 coriaceous, with a smooth triangular area in the middle of 

 the third sternite, the fifth sternite with the keels finely 

 granular, the external ones very short. Tail about six times 

 as long as the carapace, which is a little shorter than its fifth 

 segment, its fourth segment a little more than twice as long 

 as wide (6'2 : 3) ; vesicle slightly wider than brachium, 

 about as wide as hand ; the intercarinal spaces finely granular ; 

 median lateral keel represented by a few posterior granules ; 

 the normal keels strong and coarsely granular, the superior 

 subdenticulate and ending posteriorly in an elongated denticle, 

 those on the fifth strongly granular ; vesicle strongly 

 granular ; the tooth large, with conspicuous accessory 

 denticle. 



Chelce of medium length, keels and granulation normal, 

 hand only very slightly thicker than brachium, narrow, 

 weakly keeled, the keels subgranular; digits in contact, weakly 

 lobate and sinuate at the base, the movable about twice as 

 long as the hand-back, furnished with 15 rows of teeth. 



Fectinal teeth 18 ; no lobate expansion at the base of the 

 shaft. 



Aleasurements in millimetres. — Total length Q2 ; length of 

 carapace 6*5, of tail 39 ; width of the first segment 3*5, 

 of the fifth 3, length of latter 7 ; width of vesicle 2'Q, of 

 brachium 2"3, of hand 2"5 ; length of hand-back 4*5, of 

 movable digit 9. 



Loc. Bugaba in Panama [G. G. Champion) . 



I am doubtful as to the sex of this specimen. The short- 

 ness and slenderness of the tail, coupled with slender un- 

 modified chelae, are evidence of its being a female. If this be 

 the case, the absence of the pectinal lobe removes the species 

 from the vicinity of the so-called americanus section of the 

 genus, and points to relationship between it and the Brazilian 

 species stigmurus^ hahiensis, and rufofuscus, especially stiff- 

 murus. But from these it differs in having the caudal crests 

 stronger and more strongly denticulated, especially the 

 superior. 



