116 U.S. NATIONAL MUSEUM BULLETIN 244 



Jones (1926) has stated that the male of 0. dendrokomos differed 

 from the male of 0. townsendi (and 0. bonniwelli) in the fact that in 

 the former species the lower margin of the discal cell is darkened in 

 the primaries whereas in the latter species the entire cell is filled 

 solidly with blackish brown. This observation is not correct as the 

 two insects agree closely in their color pattern, with the discal cell of 

 both being only partially darkened. 



The prime difference of size between 0. t. dendrokomos and 0. t. town- 

 sendi involves both larval case (and larva) and adult male. Wing 

 measurements were made of 44 males from Alpine, Texas (type locality 

 of 0. t. dendrokomos); the average expanse was 43.3 mm. with a range 

 of 33^9 mm. Forty-three specimens of 0. t. townsendi were measured, 

 of which 41 were captured either at El Paso, Texas (type locahty of 

 0. bonniwelli) or at Las Cruces, New Mexico (type locahty of 0. town- 

 sendi). The range of this sample was 35-42 mm. with a mean of 

 39.35 mm. The difference, tested by Student's t-test (Simpson, et al., 

 1960), was found to be very significant: t=6.728, P<.001.* The 

 means of the larval cases show an even greater difference. For 

 0. t. dendrokomos the male cases averaged 90 mm. in length with an 

 observed range of 75-110 mm. (n = 10); the female cases exhibited a 

 mean of 102 mm. with a range of 80-115 mm. (n = 17). In 0. t. town- 

 sendi the larval cases were considerably smaller with a mean of 65.5 mm. 

 for the male sacks (n = 31) and 80.4 mm. for the female (n=12) ; the 

 size range of the male was 55-80 mm. and 75-100 mm. for the female. 



Material examined. — 52 c?cf, 1 9, 31 cases: 



UNITED STATES: Texas: Alpine, 40 cf &, April 23-June 7; cf , type, May 5; 

 cf , May 3; 8 d^ cf , USNM; c?, May 6; 2 cf cf with cases, ANS. Alpine, Mitre 

 Peak, 24 cases, USNM. Musquiz Canyon, 20 miles W. of Alpine, 5 cases, USNM. 



Oiketicus townsendi mexicanus Gaede, new combination 



Figures 51, 103, 355; Map 10 



Oiketicus mexicanus Gaede in Seitz, Macrolep. World, vol. 6, p. 1184, pi. 169f, 



1936. 

 Oiketicus townsendi form dendrokomos Vazquez, Anales Instit. Biol., vol. 13, no. 1, 



p. 280, figs. 25-31, 41; pi. 1, figs. E-R; pi. 2, fig. E, 1942, (not Jones, 1926); 



in Mem. Congr. Cient. Mex., Vll-Cienc. Biol., pp. 329, 330, 332, 333, 334, 



335, 336, 339, fig. 3, 1953. 

 Oiketicus 7nultidentatus Vazquez, Anales Instit. Biol., vol. 13, no. 1, p. 289, pi. 3, 



fig. 10, 1942 (new synonymy) ; in Mem. Congr. Cient. Mex., Vll-Cienc. Biol., 



pp. 325, 339, fig. 7a, 1953. 



Male. — (Fig. 51.) Antennae with 32-40 segments; outer fourth 

 serrate. Vesture of body light yellowish to dark brown. Epiphysis 

 sometimes well developed, ranging from % to % length of foretibia. 

 Meso- and metathoracic legs each with apical spur. 



*For explanation of symbols, see ftn., p. 114. 



