— 
Ww 
- 
T 
— 
Vri 
— 
a” 
— 
Lg 
-— 
No 
9 
N 
= 
.401.] NORTH-AMERICAN INVERTEBRATES. 425 
not indicated by black lines, hand very slender, the fingers longer 
than in Vejovis spinigerus, color uniform yellowis 
Vejovis flavus Bks. (N. Mex.) 
On underside of first caudal (à no median keels, or at most only 
indicated by blacklines . 
. 13 
. Underside of cauda not very dni the kets all Indicsthd by black 
lines, palpi usually yellowish 
Vejovis spinigerus Wood. (Tex., Ariz., Cal.) 
Underside of cauda, with the whole of dorsum and the palpi dark red- 
dish-brown ; no black lines indicating the keels on cauda, smaller 
than the preceding. . . Vejovis carolinus Koch (S. C. to Tex.) 
A tarsal spur at end of the first tarsal er of legs 3 and 4 
(fam. Buthide) 
Pale ; no spine under sting, teeth on finger of palpus in many oblique 
rows, with stouter teeth at end of each and to one side; thirty to 
thirty-five teeth in combs, under keels of last caudal segment very 
strongly toothed . . . Uroplectes mexicanus Bks. (Tex., Cal.) 
No tarsal spur at apex of first tarsal joints, usually a spine under the 
stin 4 fam. Centrurid@) 15 
S 
. The oblique rows or ih: on de finger o of paps have on each side a 
parallel row of minute teeth . . (Centrurus) 17 
No parallel rows each side j so 0 
The ends of the oblique rows of an olan a distinct spine 
under sting, id to twenty-two teeth in comb, color dark red 
brown . Tityus floridanus Bks. (S. Fla.) 
The ends of the rows ae maai but often connected in one direct 
line, cauda and palpi very long and slender 
Isometrus maculatus De Geer (S. Fla.) 
No spine.under the sting, cauda very long and slender 
Centrurus exilicauda Wood. (Cal.) 
At least a small spine or tubercle under the sting, cauda less slender 18 
Body vittate with black and yellow 3 i ce: 24 
Body nearly uniform reddish-brown or : blackish 
: 19 
- Body a rig ITEE cephalothorax very ees aiti lBirongir 
granulat : . . Centrurus nigrescens Pock (Tex.) 
Body reddish « or yellowish dius au 20 
Fingers paler than hand, yellowish, adrei din veð d spine under 
sting often small and blunt Centrurus eri pines Gerv. ios 
Fingers usually darker than han 
- Color yellowish-brown, combs with shy more + thant tventydoar ih 
spine under sting not very prominent 
Centrurus testaceus De Geer (S. Fla.) 
Color reddish-brown, combs with usually more than twenty-five teeth, 
spine under s well — usually much larger than the pre- 
ceding. <P ae . 4. Centrurus gracilis Gerv. (Fla.) 
