72 Trans. Acad. Sci. of St. Louis 
below according to their known distribution. In no case 
has the writer found an authentic report of a western 
form east of Kansas, or an eastern form west of it, and 
in all cases the known reports in Kansas, with the ex- 
ceptions of Crotaphytus collaris and Ewmeces obsoletus, 
clearly indicate each species to be either eastern or west- 
ern in its center of distribution as a glance at the maps 
will show. 
The four species with their present centers of distribu- 
tion in the southwest are Sceloporus undulatus thayeru, 
Holbrookia maculata maculata, Phrynosoma douglassu 
ornatissimum, and Eumeces obsoletus. 
The remaining five species, which have apparently 
come from the southeast are Sceloporus undulatus un- 
dulatus, Ophisaurus ventralis, Leiolopisma laterale, 
Eumeces anthracinus and E. fasciatus. 
Lizards occur in varying abundance in Kansas both 
as species, and as representatives of genera and fam- 
ilies. The families Iguanidae and Scincidae are repre- 
sented on the state faunal list by six species each, both 
being rich in multiplicity of forms, whereas the families 
Anguidae and Telidae are represented in Kansas by one 
species each. Phrynosoma cornutum is a species which 
has always been taken singly in Riley County, according 
to the records, but nine specimens were collected in one 
afternoon in Ottawa County and more were observed. 
It is not easy to classify lizards as to abundance, though 
some are distinctly rare species and others are very com- 
mon. The following table classifies Kansas lizards by 
species according to the extent of their appearance in 
collected material, and gives a rough index to their rela- 
tive abundance in the state, since common lizards are 
taken oftener than rare ones. 
