1961] 
Nutting and Gurney - — Genus Vostox 
51 
Baja California are a dark, smoky brown over-all, nearly black on the 
head, and diminishing posteriorly to a dark chestnut brown on the 
forceps. The appendages and outer portions of the wing scales are a 
lighter smoky brown. 
Nymphs: Three nymphs, presumably collected with one of the 
adult males, are included with the paratypes. These specimens are 
probably more than half-grown, for they range in length from 6.5 to 
7 mm., and each bears moderately developed, fused wing pads. The 
antennae are 10- to 12-segmented. Each of the first six abdominal 
sterna bears two long setae, which are conspicuously arranged in con- 
tralateral rows, one-third of the width of the abdomen from each 
margin. (This pattern may exist in the adult stage but is not evident 
in any of our specimens.) The smooth forceps range from 1.8 to 
2.2 mm. in length but show none of the specializations of either sex 
beyond the minute tubercles along the dorso- and ventro-internal 
margins. Figure 5 shows the configuration of the pygidium which 
suggests that all three may be females. Their coloration is similar 
to the holotype, except that the outer two-thirds of both pairs of wing 
pads are dark brown and the inner third is a lighter, yellow-brown. 
Holotype: U.S.N.M. No. 65696 
Type locality: Santa Catalina Mts. (2000-3000 ft.), Pima Co., 
Ariz. 
The holotype male was collected by Andrew A. Nichol on Au- 
gust 15, 1924. In reply to a recent inquiry as to the exact locality, Dr. 
Nichol has recalled that it was in the lower parts of either Sabino 
Canyon (south slope of the range) or Canada del Oro (north and 
west slopes), probably the former. The allotype (U.S.N.M.) was 
taken under lights on the bridge over the Salt River (dry), Tempe, 
Maricopa Co., Ariz., on July 18, 1947, by Floyd G. Werner. 
Paratypes: U. S. National Museum (1 cT, 1$, 2 nymphs) ; Depart- 
ment of Entomology, College of Agriculture, University of Arizona, 
Explanation of Plate 6. 
Figs. 1-8, Vostox excavatus , new species. 1. Forceps of female allotype, 
dorsal view. 2. Male pygidium (Tucson), dorsal view. 3. Male pygidium 
(Virden), dorsal view. 4. Pygidium of female allotype, ventral view. 5. 
Nymphal pygidium, ventral view. 6. Male forceps (Tucson), dorsal view. 7. 
Forceps and pygidium of male holotype, dorsal view. 8. Concealed genitalia 
of male holotype: Pm, paramere; Pn, penis; BV, basal vesicle; EjD, ejacula- 
tory duct. Figs. 9-14, Vostox brunneipennis (Serv.). 9. Left penis and para- 
mere (Gainesville, Fla.), dorsal view. 10. Male pygidium (Dallas, Tex.), 
dorsal view. 11. Male pygidium (Gainesville), dorsal view. 12. Female 
pygidium (Paris, Tex.), ventral view. 13. Female forceps (Mobile, Ala.), 
dorsal view. 14. Male forceps (Gainesville), dorsal view. Figs. 1-7, 10-14, 
xl5; Figs. 8 and 9, x34. (Drawings by senior author). 
