The Lizards of Kansas 29 
phenomenon. Winton (1916) stated that ‘‘The favorite 
haunt seems to be along the edge of thick vegetation.”’ 
He also gave evidence that the blood ejecting habit was 
connected with the process of molting. The same author 
_ (1917) wrote that ‘‘Male horned lizards sometimes fight 
each other in hot weather, if confined closely. ... In 
North Central Texas, the horned lizards disappear with 
the first cold burst, which usually comes between the 
middle of September and the first of October,’’ and 
(1916), ‘‘In the area of their greatest abundance they 
first appear from their winter burrows about the middle 
of April.’’ Housholder (unpublished) stated that 
‘Horned lizards are very common along roadsides with- 
in their range.’’ 
Horned lizards are strictly terrestrial in their habits, 
and are found most abundantly in dry, sandy areas 
where there is little vegetation. Hower, their distribu- 
tion is not confined to sandy areas, for they often occur 
about limestone ledges. Individuals are frequently 
found close to dwellings, and may even breed in the 
dooryard. Horned lizards frequent the highways in 
some regions and pastures are often well populated with 
them, 
The breeding habits of P. cornutwm have been rela- 
tively well studied. Edwards (1896, 1903) has excel- 
lently described the nest digging habits. Strecker (1908) 
found ‘‘A set of eggs deposited in four layers of six 
each. . . The period of incubation is about forty days 
... the eggs are usually buried to a depth of six or 
seven inches and . . . the breeding season extends from 
the middle of April into the latter part of July.”’ Giv- 
ler (1922) has given a detailed account of part of the 
life history of the species as follows: ‘‘The lizards come = 
forth about May 1. At first the males greatly pre-e 
