In the following list we have cited only those species that were stated to have been found under desert conditions. Undoubtedly, related species that have been taken in similar localities are also desert-inhabiting forms, as, for example, other species of _Arenivaga_ that were collected in Texas by Hebard (1943a). In the absence of specific information linking such other species with deserts, we have arbitrarily relegated those forms to the section on outdoor habitats. In addition to the species listed below, desert cockroaches are said to be found in the following genera: _Anisogamia_, _Mononychoblatta_, and _Nymphytria_ (Chopard, 1938). DESERT COCKROACHES =Agis orientalis= _Northern Kenya._--In desert-grass and thorn-bush country; scattered, dry tufts of grasses interspersed among acacia bush and scattered trees (Kevan and Chopard, 1954). =Arenivaga apacha= _U.S.A._--Inhabits desert regions of the Southwest, has been found in nests of wood rats (Hebard, 1917). =Arenivaga bolliana= _U.S.A._--On gravelly hillocks, in scattered scrub, and in the nests of wood rats in Texas. It is a desert inhabitant in the Southwest (Hebard, 1917; 1943a). =Arenivaga erratica= _U.S.A._--Inhabits desert regions of the Southwest (Hebard, 1917). In Arizona it has been found in rodent burrows in the desert (Vorhies and Taylor, 1922; Ball et al., 1942). =Arenivaga roseni= _Turkmen S.S.R._--Predominantly found in burrows in sand; all stages "swim" in sand and loess dust (Vlasov and Miram, 1937). =Blattella vaga= _Arizona._--Found in small numbers on the dry desert (Flock, 1941a). =Compsodes schwarzi= _U.S.A._--Occurs in the Southwest where it is confined to the desert and semidesert mountainous areas, rarely being found on the desert floor (Hebard, 1917). Taken in an ant nest in mountains of Arizona (Ball et al., 1942). =Cyrtotria capucina= _Eastern Africa._--"Commonly met with under débris, the apterous females being most frequent." Thorn-bush country (Kevan and Chopard, 1954). =Derocalymma lampyrina= _Northern Kenya._--Very abundant; both sexes under débris in desert-grass and thorn-bush country (Kevan and Chopard, 1954). =Derocalymma porcellio= _Northern Kenya._--Taken in upland grassland and bush (Kevan and Chopard, 1954). =Deropeltis autraniana= _Northern Kenya._--In thorn-bush country (Kevan and Chopard, 1954). =Deropeltis melanophila= _Northern Kenya._--"Very commonly found at the base of tufts of grass and other débris, the apterous female particularly in the latter situation"; in upland grassland near forest; in thorn-bush country (Kevan and Chopard, 1954). =Deropeltis nigrita= _Northern Kenya._--Taken in upland grassland and bush (Kevan and Chopard, 1954). =Eremoblatta subdiaphana=