TlIK nATRACIIIA Or NO|{TII AMKRIfA. 



Jill* 



r 



of I'liiscil lionh'i' to as Ciir as alutvi^ atid licliiiid tlic lyiiipaiii*- iiit'inluaiu-, 

 tim.s imitatiiij;' faintly llu5 li. lciili(jiiiosi(.s ((inciicantts. 



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Flii.fiO Itiil'ii /luiii'tnliiii. \i>. Klliri. (':i|n> Saint I.in'iiH ; |. 

 Ml ilxlilinii lih (</ .V((. "JUl"*. 



Jir. 



Lcii;-!!! of lii-iiil mill liody (l.VJ 



I,i'li;;lll of liriiil In |Mislcli(ir «'ily;i' of lyili|>:itKl dliri 



Willi ll 111' iii'ilil itt liiislrfiiir rilj^c of I viii|i;ilia 01 '.I 



l.i'iij^lh III' I'orr liii'li {\->7 



Lrli^tll of iMistcnul' lilllli (IliO 



I-iii;:tli ofliliiii (ll'.t 



l-inj^tli iiriarsiiH Oil 



lifii^tli of ri-iiiaiiiili'i' III" I'm i| OH 



This sjn'cics is ofratlicr variahlt' cdltnatioii. 'i'lic tyjic (No. LMUS) Is 

 a nniloiiii li;;Iit brown above and yt'llowisli-wliih" iiclow. In two otlici' 

 siu'fiiiiciis li'oni the same locality the dorsal tiihercles are p ile, with a 

 daik liiifjat the base. The latter is the prevalent eoloralion. I'oi' whili^ 

 tlu'ie iiie six specimens which show if, there is only one other ol t'lie 

 nnit'oiin brown tint. Specimens from Cape St. Lucas have red wans, 

 with a black rin^' at the base, and have the };ronnd cohn- of the sides 

 black besides. TheHiinder extremities hav(^ larjic blackish blotches, in- 

 closin;;' Inberclcs which are pink. There is also a idack spot on the 

 eyidid, one below the canthns rostralis running longitudinally, and one 

 which extends below and sometimes behind the tympaimm. 



This is oiH' of our best marked species. Its distrilmtion exti'iidsfiom 

 western Tt^xas from as far north as Kort(3oncho, and nhn\'^ both sides of 

 the boundary line between the United States ami I\Iexi«'o, to the Pacific 

 ocean. It is found as far south as San Antonio, in Texas (Marnoek), 

 and in Lower California to the extremity of the ju'iiinsiila ^ Xaiitus). and 

 in Mexico to (Juanajiiato (Dnjjes). 



The paired },dantllike rid}j,ef< '>'< the back, represented in tiie li.:;iire of 

 this species in the Heport of the Cnited States and Mexican Iloiindary 

 Siirvc_,-, are merely the projections caused by the dorsal and sacral dia- 

 pophyses, somewhat exa.ujjferated 



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