CACTUS BUGS OF GENUS CHELINIDEA (HEMIPTERA). 49 
quently, it was taken generally over the canyon country north 
of Uvalde, Texas, but its distribution is apparently limited to 
the canyons. Its food is the prickly-pears of such regions. 
Since the above date I have constantly referred to it in my 
reports and correspondence under the manuscript name of 
Chelinidea canyona. 
Chelinidea vittigera Uhler, var. texana, n. var. 
This variety differs from thé typical C. vittigera Uhler 
mainly in that the representatives are slightly less robust 
and that they lack the colour markings of the described form. 
The colour is uniformly testaceous, with membranous portion 
of hemelytra and tip of beak smoky black. 
Length 10 to 13 mm. ; humeral breadth 3 to 4-5 mm. 
It is this form of Chelinidea which is the common cactus 
bug of Texas. In that State I have taken it at Kingsville, 
Brownsville, Laredo, San Antonio, Uvalde, La Pryor, Con Can, 
and Eagle Pass. In Mexico I have taken it in the country just 
south of Piedras Negras (Coahuila) and at Monterey (Nuevo 
Leon). 
Besides the various Opuntias of the regions mentioned, I 
have occasionally found it feeding upon LHchinocereus sp. 
(“ pitallo”’) and Opuntia leptocaulis (** tasajillo’’). 
