174 PROCEEDINGS OF THE NATIONAL MUSEUINI ^"^ ^^ 



upon a specimen collected near Bray, Calif. (Siskiyou County), June 

 29, 1935 (Oman). I have examined a lon^ series of specimens in- 

 cluding adults of both sexes and one nymph from Bray (Beamer and 

 Oman) ; females from Weed, Calif. (Ball) ; near Bend, Oreg. (Bea- 

 mer and Oman) ; Cliffdell, Wash. (Oman) ; Naches, Wash. (Beamer) ; 

 and males and females from Craig, Colo. (Beamer). 



ERRHOMUS (CARSONUS) IRRORATUS SPICATUS, new subspecies 



Platk G, Figure 13 



Externally identical with typical irrorafus but with the pygofer 

 process of the male with an erect, spinelike extension of the dorsal 

 margin distally. 



Type locality. — Criterion Pass, Oreg. 



Types.— U.^.^M. no. 52222. 



Remarhs. — Described from two macropterous males, the holotype 

 collected July 2, 1935, by the writer, paratype from Tampico, Wash., 

 May 16, 1932, A. K. Rolfs. 



The true significance of the differences found in the pygofer proc- 

 esses of the males and the heads of the females belonging to this 

 subgenus is not clear, and the problem is made more difficult by the 

 rather infrequent association of specimens of the two sexes in material 

 collected at a single locality. Because aridus Ball shows considerable 

 uniformity of structure in material from several localities, I have 

 decided to call attention to certain other segregates by describing 

 them as subspecies of irroratiis or aridus. 



ERRHOMUS (CARSONUS) MACULATUS (Gillette and Baker) 



Plate 6, Figure 9 



Acocephalus mavidatiib- Gillette and Bakek, Colorado Agr. Expt. Stat. Bull. 31, 

 p. 83, 1895. 



Resembling irroratus but with crown flat or concave and posterior 

 margin of seventh sternite of female less deeply incised. Length of 

 female 6-6.5 mm, of brachypterous male 4-4.25 mm, of macropterous 

 male 4.75 mm. 



Color as in irroratus but usually not so dark. Crown rather short, 

 not subangular at apex. Fore wings of brachypterous specimens 

 reaching fourth abdominal segment; macropterous males usually with 

 three anteapical cells in fore wing. 



Seventh sternite of female large; notches and sinuations in poste- 

 rior margin not so pronounced as in irroratus. Male plates about as 

 in irroratus. 



Pygofer process of male ending in one straight spine and one 

 slender spine wliich curves mesad. Styles and aedeagus as in 

 irroratus. 



