44 



A SYNOPSIS OF THE SPECIES OP 



No light stripes ; olivaceous with black bars on sides which cross back on lumbar region ; rump 

 and hind legs yellow spotted ; femoral scales 8 rowed ; infralabials 6 ; muzzle elongate ; me- 

 dium C g. eostatus. 



The geographical distribution of the subspecies is as follows : 



C. g. gularis, Sonoran region. 



C. g. angusticeps, Yucatan. 



C. g. ma/riarum, Tres Marias islands. / 



C. g. eommunis, S. W. Mexico. 



V. g. scalaris. Chihuahua and southward. 



G. g. semifasciatus, Coahuila, Mexico. 



C g. costatus, Mexico ; locality unknown. 



These forms may be compared with those of the C. tessellatus in color charac- 

 ters as follows. I have already remarked* that this series of variations follows quite 

 closely those pointed out by European authors to exist in the Lacerta muralis. 

 These have been made the subjects of especial study by Prof. Eimer of Tiibingen, 

 from whose paperf I extract the following points of comparison (see Plate XII). 



1. Longitudinally striped 



2. Dark interspaces pale spotted 



3. Dark interspaces divided by light 



color 



4. Dark spots confluent transversely, 



forming crossbars 



5. Light spots not confluent ; light 



stripes broken up ; pattern reticu- 

 lated 



6. Dark spots separate and on a brown 



ground 



Cnem. tessellatus. 



G. t. perplextis. 



G. t. tessellatus a. 

 G. t. tessellatus /3. 



G. t. tessellatus 



G. t. melanostethus. 

 G. t. ruMdus. 



Gnem. gularis. 



G. g. gularis a. 

 G. g. scalaris a. 



G. g. scalaris /S. 

 G. g. costatus. 



G. g. semifasciatus 



Other CnemidopK i. 



G. octolineatus. 

 G. sexlineatus. 



G. labialis. 



G. septemvittatus. 



G. Qrahamii. 



G. variolosus. 



Lacerta muralis. 



L. m. campestris. 



L. m. albitentris. 

 L. m. striatomacu- 



lata. 

 L. m. reticulata. 

 L, m. tigris. 



L. m. punctulatofas- 

 ciata. 



There are some color forms in the Lacerta muralis which are not repeated in the 

 North American Cnemidophori, particularly those which result in a strong contrast 

 between the dorsal colors as a whole and the darker lateral colors, as a band. The 

 color variety, No. 6, of the Cneraidophori is not reported by Eimer as occurring in 

 the Lacei^ta muralis. 



* American Naturalist, Dec, 1891. 

 lArchiv. f. Naturgeschichtc,188I, 239. 



