40. THAMNOPHIS 801 
ISR 150 15% /S¢ 156 /5B /60 /62% _/6% (66 /89 Spo /7L 17% 176 178 
to . eae Bocas Sean - . erste oe . . . en > /63 
Bese ‘ /s3 
Ake oes tn ee + rN ‘ . . + ‘ . . + FR 
: ‘ . Geren 1g \ Bs 
Ci ee 
pose . + ‘ + © \ae5e ¥ od . . . ‘ ‘ . + Mg 
is Bees ! ji 8 
bond (cesentens ° . o pe oie’ + . . + 4 + /0@ 
\ 
Froud cond : 3 layed i i Pb 
Bios Boose ueense geetepe abs = ‘ fa's\ eee acer eset Haeteote ; > 9a 
F t : a) 5 
1 \ eel 
' pao tas seenalna ae 
. + - . . ° ES ne rU ‘ Monod Cys eer os ge ber : 64 
' ; : ' : : P 
mot : é Sebi 3% 
: . . + . ihe : met + eons Oe be cee i . t & 
i SiEisinseirs ibis, Bede os Benace a be vibermegs Fen Heres f 
: \ H we 
’ ‘ « ‘ Doe ar ry - pater steeper ae TM * % 
a Na ; \ is : Hae? & 
w H } ae fe oS SC a Si : ' \ iON Pa ; Frc GC 
HY I 
Figure 1 
Fig. 1, This chart shows the number of gastrosteges in specimens of Thamnophis 
sirtalis concinnus, represented by a continuous line, and Thamnophis sirtalis infernalis, 
represented by a broken line. The upper half of the chart shows the counts in males, 
the lower half the counts in females. The chart shows the percentage of the total number 
of specimens of each sex having each number of gastrosteges, and brings out clearly the 
fact that in T. s. infernalis these scutes are more numerous than in T. s. concinnus. 
T. sirtalis concinnus may be readily distinguished from 
T. ordinoides ordinoides of the same regions, by its larger 
eye, and more numerous scales 
Habits—This snake probably does not differ in habits 
from its close relatives. 
