. Brigham Young University science bulletin. Biology -- Periodicals. Ants of the Nevada Test Site Aphaenogaster boulderensis M. R. Smith This species was first described from workers collected on Horseshoe Island, Lake Mead, Boulder Dam (now Hoover Dam), Nevada. The distinctive worker is rather small (length to mm), very slender, and with stronglv round- ed posterior corners of the head and a rounded occipital border. The epinotal armature con- sists of faint tubercles. The bodv is a rather uniform, pale, fernigineous red, with the gaster sometimes slightly darker. No nest was found at
. Brigham Young University science bulletin. Biology -- Periodicals. Ants of the Nevada Test Site Aphaenogaster boulderensis M. R. Smith This species was first described from workers collected on Horseshoe Island, Lake Mead, Boulder Dam (now Hoover Dam), Nevada. The distinctive worker is rather small (length to mm), very slender, and with stronglv round- ed posterior corners of the head and a rounded occipital border. The epinotal armature con- sists of faint tubercles. The bodv is a rather uniform, pale, fernigineous red, with the gaster sometimes slightly darker. No nest was found at the test site. Two workers were taken from soil cans in mixed vegetation in October. The ants probablv nest beneath stones and form small colonies. Ap- parently boulderensis is poorly represented at the test site. It mav indeed be a rare ant any- where. Aphaenogaster megommatus M. R. Smith This species was described recently (Smith, 1963) from workers collected in Nevada, Ari- zona, California, and Oregon. Although no nest was found at the test site, the ants rather commonly appeared in can traps from areas of Larrea, Larrea-Franseria, and Grayia-Lycium. A. megommatus is a crepuscular and noc- turnal forager. The worker is readily recogniz- able by its pale color, extraordinarily large, black eyes, and long, slender antennal scapes. Bodv length varies from to mm. The previously undescribed sexual castes are described as follows: Male. HL to mm, HW to mm, CI to , SL to mm, SI to , EL to mm, EW to mm, OI to , TL to mm, PNL to mm, PNW to mm, PPL to mm, PPW to mm. Head distinctly longer than broad; eyes very large; maximum width of head across the eyes to mm; antennal scape short, its length less than the combined lengths of first two funicular segments; anterior border of me- dian lobe of clypeus with a shallow but distinct notch. Epin
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