VI. DESERT ARTHROPODS
341
Fig. 12. (a) Adult males (winged) and females of the desert cockroach Arenivaga
investigate!, from sand dunes in the Colorado Desert near Palm Springs, California.
(b) At night adult females and nymphs wander just below the surface, leaving
ridges. Occasionally they emerge and leave the tracks shown in the center of the
photograph. The smaller sinusoidal ridge below is made by the larva of a therevid
fly.
measured and we refer to this aspect of their ecology on p. 365, where
it will be shown that even on the hottest and dryest days, equable temperatures and humidities above 80% are always available.
If partially dehydrated sand roaches are put into air with a relative humidity of 82.5% or above, nymphs and adult females but not adult males
341
Fig. 12. (a) Adult males (winged) and females of the desert cockroach Arenivaga
investigate!, from sand dunes in the Colorado Desert near Palm Springs, California.
(b) At night adult females and nymphs wander just below the surface, leaving
ridges. Occasionally they emerge and leave the tracks shown in the center of the
photograph. The smaller sinusoidal ridge below is made by the larva of a therevid
fly.
measured and we refer to this aspect of their ecology on p. 365, where
it will be shown that even on the hottest and dryest days, equable temperatures and humidities above 80% are always available.
If partially dehydrated sand roaches are put into air with a relative humidity of 82.5% or above, nymphs and adult females but not adult males