Hypotrix alamosa ( Barnes, 1904 ) Lafontaine & Ferris & Walsh, 2010

Lafontaine, Donald, Ferris, Clifford & Walsh, J., 2010, A revision of the genus Hypotrix Guenee in North America with descriptions of four new species and a new genus (Lepidoptera, Noctuidae, Noctuinae, Eriopygini), ZooKeys 39 (39), pp. 225-253 : 244-246

Hypotrix alamosa ( Barnes, 1904) , comb. n.

Figs 10, 11, 27, 42

Taeniocampa alamosa Barnes, 1904: 201 .

Type material. The species was described from a male and a female in USNM. Type locality: USA, Arizona, Huachuca Mts. Th e female is in better condition and represents the more common dark form, so it is here designated as lectotype. It is labeled “ Taeniocampa alamosa type ♀ Barnes/ Huachuca Mts. Ariz./ Photograph Pl. VI No. 18 [green printed label with “VI” and “18” hand written in black ink]/ Barnes Collection.” It is in good condition except that the antennae are missing.

Other material examined and distribution. USA: Arizona: Cochise Co. (Chiricahua and Huachuca Mts), Pima Co. (Santa Catalina Mts), and Santa Cruz Co. (Santa Rita Mts).

Diagnosis. Hypotrix alamosa (forewing length 14–16 mm) occurs in two forms. In the darker, more common form (Fig. 10) the forewing is reddish brown with the

Figures 46–48. Hypotrix and Anhypotrix male genitalia. 46 H. lunata 47 H. purpurigera 48 Anhypotrix tristis .

maculation sharply defined by dark-red lines. Th e medial area is similar in color to the remainder of the forewing and the postmedial line touches, or almost touches, the reniform spot. Superficially this form is most similar to Hypotrix hueco (see under H. hueco ) and Xestia bolteri (Smith) , both of which occur with H. alamosa . It differs from Xestia bolteri in that H. alamosa has smaller reniform, orbicular, and claviform spots, and in lacking spiniform setae on the tibiae; Xestia bolteri is illustrated in Lafontaine 1998. Th e pale form of H. alamosa looks like the specimens have been bleached, so the forewing is light orange with the maculation weakly defined by fine yellow lines. Th e dark and light forms frequently occur together and the two syntypes of H. alamosa represent a specimen of each form. The male genitalia differ from those of other species in many features: the valves are tapered from the base to apex a slightly indented “neck” at the base of the triangular cucullus; the sacculus is very large with a rounded lobe projecting from the dorsal margin and the membranous saccular flap overtops almost the entire sclerotized part; the digitus is wide and truncated apically; the apical half of the uncus is broad and spatulate; the vesica has a mass of cornuti near the apex of the aedeagus, and the apical part of the vesica has four tight coils. In the female genitalia the appendix bursae has four tight coils, corresponding to those

in the vesica, and the ductus bursae is heavily sclerotized with a prominent posterior bulge to the left.

Distribution and biology. Hypotrix alamosa in known only from southeastern Arizona. Collecting dates range from early June to mid-July and early to late September.