BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS 29 



under discussion, coming very freely to light" (Kevan and Chopard, 



1954). 



Parcoblatta desertae 



U.S.A. — In the desert and semidesert mountainous areas of the 

 Southwest; it is rarely found on the desert floor (Hebard, 1917). 

 Found under boulder on bare desert (Rehn and Hebard, 1909). 



Polyphaga aegyptiaca 



Caucasus. — The wingless female was found buried in sand and dust 

 (Burr, 1913). 



Turkmen S.S.R. — Although this species is secondarily encountered 

 in dwellings and courtyards, it is a very characteristic insect of the 

 Trans-Caspian deserts ; the females are encountered fairly frequently 

 as inhabitants of sand, where they run slowly over the surface, or dig 

 themselves into the sand to continue their forward motion not far 

 below the surface (Fausek, 1906). Uvarov (in Chopard, 1929b) indi- 

 cated that females of this genus are found in various desert localities, 

 particularly where vegetative debris occurs, but they are not strictly 

 attached to sandy terrain. 



Polyphaga indica 



Turkmen S.S.R. — This species prefers sandy soils where the 

 nymphs, alate males, and wingless females "swim" readily through 

 the sand; they can also be found in the burrows of desert animals 

 (Vlasov and Miram, 1937). 



Polyphaga saussurei 



Turkmen S.S.R. — Its principal habitats are rodent burrows in loess 

 dust and burrows of the desert turtle (Vlasov and Miram, 1937). 



Supella hottentotta 



Northern Kenya. — Taken in bushes by dry river bed and in desert- 

 grass and thorn-bush country at several stations (Kevan and Chopard, 

 1954). ". . . taken with Hght at night running on bark of a large 

 acacia tree" (Rehn, 1947)- 



Symploce kevani 



Northern Kenya. — In desert grass and thorn-bush country (Kevan 

 and Chopard, 1954). 



