lioad, w id e n in g on th e o rb its , so a s to en c lo se th e ey e s, a n d e x te n d e d a cross th e c h e ck to th e e a r s .
F o r e h e a d r a th e r co n c av e , q u a d r a n g u la r , lo n g e r th a n b ro ad , ro u n d ed in f ro n t, s lig ijliy p ro d u c e d
in to an a n g le o v e r th e ey e s , a n d c o n tr a c te d in fo a sh a rp a rch ed c r e s t on th e oc c ip u t, c o v e red with
s u h - e q u a l fla t s c a le s , liav in g a p e a r ly a p p e a r a n c e . S id e s o f th e h e a d co n c av e , w ith a n a n g u la r
p rom in e n c e o v e r th e u jip e r f ro n t ed g e o f th e e a rs , a n d a r id g e o f la rg e r k e e le d sc a le s , e x te n d in g on
th e s ide o f th e o c c ip ita l c re s t, to th e b a c k o f tlie fo reh e ad . L ab ia l sc a le s, ob lo n g a n d s iib -e q iia l.
'I'lie th ro a t cove red with lo n g itu d in a l line s o f la rg e r k e e le d sc a le s , with a ra th e r la rg e r c e n tr a l sc rie s,
fo rm in g a n o b s cu re c re s t. S c a le s o f th e bod y sm a ll a n d th in , w ith an o b s c u re su b sp in o s e tip , la rg e r
a lo n g th e dorsa l rid g e , fo rm in g a s lig h t c r e s t, a n d sm a lle r on th e s id e s : th o se o f tiie b e lly, limbs, a n d
ta il la rg e r, k e e le d ; th e s c a le s o f th e to e s fo rm in g th r e e rid g e s . T h e in n e r a n d o u te r fore toe s slio rt,
th e m id d le o ne s lo n g e r, n e a rly eq u a l, th e in n e r h in d to e s re a c h in g j u s t to (he firs t jo in t o f th e s e co n d ,
th e se cond to e s to th e s e c o n d jo in t o f th e th ird , a n d th e o u te r to tlie k n u c k le - jo in t. L e n g th o f
lie a tl, 10 l in e s ; o f he ad a n d b ody, 2 } i n . ; o f t a il, 5^ in c h e s ; h e ig h t o f o c c ip ita l c rc s f, 9 lin e s ; len g th
o f th ig h a n d fo re le g , 9 l in e s ; o f b in d fe e t, 1 inch.
T r o p i d o l e p i s t o r q u a t u s , i .3 0 ./ .2 . Gray in Griffith, Anim. Kingd.
Scelophorus torquatus, Wiegmann, Isis, 1828, xxi. 364.
O liv e b row n , p a le g re en ish w h ite o r b lu e ben e a th . N a p e w ith a b ro a d b la c k b a n d , edged above
a n d be low by an a r c h e d o ra n g e yellow ( in sp irits, y e llow ish wliite ) b a n d j th e f ro n t b a n d com m en c in g
a l ittle b eh in d th e e a rs , a n d d e e p ly c u rv e d , th e b in d e r com m en c in g j u s t ab o v e th e fo re leg , ov e r th e
f ro n t o f th e b a se o f w h ich i t ex te n d s . S c a le s la rg e , o f th e b a c k b ro ad , sh o rt, c o n c a v e , w ith rai.sed
ed g e s a n d a te rm in a l, c e n tr a l, slig h tly r a is e d a n d e x te n d e d k e e l, w h ich is .serrated a t th e tip . T h o s e
o f th e n e c k r a th e r sm a lle r ; o f th e le g s a n d ta i l , espe c ia lly th o se o f th e la tte r , lo n g e r and m o re d is t
in c tly k e e led , a n d d a g g e r -p o in te d . T h e sc a le s o f th e th ig h s sm a lle r th a n th o s e o f th e fore legs.
T h o s e o f th e ta il la rg e s t, b e com in g n a rrow e r a n d lo n g e r tow a rd s th e tip . .Scales o f th e b e lly
m o d e ra te ly .smooth, e n tire e d g e d , r a th e r sm a lle r o n th e n e c k , a n d c o n s id e ra b ly sm a lle r a t tb e th ro a t
a n d b e fo re th e v e n t ; o f th e u n d e r sid e s o f th e lim b s sm a lle r a n d lo n g e r , e.specially on th e u n d e r
s id e o f th e h in d legs a n d ta il. S cales o f th e b e ad n um e ro u s a n d sym m e tric a l, w ith a la rg e p a r ie ta l
sliie ld , p ie rc e d w ith a h o le ; a n d sm a lle r sm o o th s c a le s o v e r th e eyebrows. L ip s w ith a d o u b le
o r tre b le se rie s o f lo n g n a rrow sc a le s , tb e h in d e r o n e s o f w liich a r e k e e l e d ; tiio se o f th e u n d e r lip
%vith a se rie s o f w h ite sq u a iis li sc a le s be low th em ; c e n tra l la b ia l s c a le u n iq u e . Bo d y and h e ad
d ep re s s ed ; e a rs la rg e , frin g e d by a s e rie s o f sc a le s in f r o n t ; lim b s s h o r t a n d s tro n g ; toe s u n e q u a l ;
fem o ra l p o re s la rg e a n d d is tin c t.
L e n g th o f b ody a n d h e a d , 3^ in c h e s ; o f ta il, 3^ inche s,
In h a b . M e x ic o , I n th e co lle c tio n o f th e B ritish M u s e um , a n d tiia t o f M r. Be ll.
T h is spe c ie s was firs t d e s c rib e d b y D r. W ie gm a n n , wlio formed from it a n d som e o th e r sp e c ie s
a new g e n u s , u n d e r th e n am e o f Scelophorus, n o t b e in g aw a re th a t it b e lo n g ed to a g en u s w h ic li I liad
licfoie e s tab lish ed , u n d e r th e n am e o i Tropidolepis, for a N o r th A m e ric a n species.
T r o p i d o l e p i s s c a l a r i s . Gray, tab.ZO.f.Z.
Scelophorus scalaris. Wiegmann, Isis, 1828, 364.
Olive , w ith a w h ite s tr e a k d ow n e a ch s id e o f th e b a c k , a n d tw o se rie s o f la rg e ir r e g u la r sp o ts,
e d g e d b eh in d with a s lig h t p a le l i n e ; b e n e a th s ilv e ry w h i te ; c h in with m a n y b lu ish g re e n b a n d s ;
s id e s v a r ie d w ith b lu ish gre en and b la c k . S c a le s o f b a ck k e e le d , e n t i r e ; o f b e lly sm o o th ; o f ta i l
k e e le d , th e u p p e r ones d ag g e r-p o in te d .
In h a b . M e x ic o .
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