. Brigham Young University science bulletin. Biology -- Periodicals. Ants of the Nevada Test Site 13 studied 47 nests of lobognathus and located 11 others which were not disturbed. The colonies were very populous and lived beneath large rocks, some of which were deeplv and strongly embedded in the soil and banked peripherally with a light coating of gravel. One nest opened into a gravel crater beside the covering rock. The workers moved rapidlv and agilely when a nest was opened. They did not attack the in- truder. Distinct and perpetual stridulation was heard. During late June and early July
. Brigham Young University science bulletin. Biology -- Periodicals. Ants of the Nevada Test Site 13 studied 47 nests of lobognathus and located 11 others which were not disturbed. The colonies were very populous and lived beneath large rocks, some of which were deeplv and strongly embedded in the soil and banked peripherally with a light coating of gravel. One nest opened into a gravel crater beside the covering rock. The workers moved rapidlv and agilely when a nest was opened. They did not attack the in- truder. Distinct and perpetual stridulation was heard. During late June and early July numer- ous males and females were in the nests. V. lobognathus seems to be one of the most abun- dant and successful components of the ant fauna on Rainier Mesa. The worker can be identified easily by its strong, superficial resemblance to Pogonomyr- mex occidentalis and salinus; its deep, ferrugine- ous brown color; its small eyes; and its very long epinotal spines. The contours of the thorax, petiole, and postpetiole, in profile, are illustrated in Fig. 16C. Veromessor pergandei Emery Probably by far the glossiest black ant of the low desert, pergandei is the dominant species of the Larrea community where it is able to flourish under extremelv xeric conditions. It is a diurnal forager which can remain active dur- ing periods of intense heat. The long trails of streaming, black workers represent a character- istic pattern of extranidal activity. The nests, which are in exposed soil, are surmounted bv low, semicircular or circular craters (sometimes multiple) of sand (Fig. 17) and are often cov-. Fig. 16. Contour of thoracic dorsum and of petiole and postpetiole. A. Veromessor smithi; B. V. lariversi; "V>3 fc! . ^>. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brigham Young University. Provo, U
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