REVISION OF TRIBE ERRHOMENELLINI — OMAN 171 



ERRHOMUS (ERRHOMUS) OREGONENSIS (Baker) 

 Platp: 6, FiGmtKs 7, 7A 

 Errhoiii onus orc(joi\vii.^ix Bakkr, r.s.voho, vol. S, p. 262, 1898. 



Very robust, with the short, broad fore wiiifrs adding to the robust 

 appearance. Length of female 7.5-9 mm, of male 5.25-5.75 mm. 



Ground color sordid yellowish white. Clypeus marked with trans- 

 verse bars of fuscous to black ; crown with irregular fuscous to black 

 marks near apex and next eyes, and a pair of black spots at base. 

 Pronotum with a black area behind each ej'e and a transverse row of 

 irregular black or fuscous markings. Fore wings with faint irregu- 

 lar brown to fuscous markings except for an area on disk; veins 

 usually sordid white. Abdomen and legs variously marked with 

 brown, fuscous, or black. All the markings of this species are ex- 

 tremely variable in intensity and size, and there are frequently irreg- 

 ular spots in addition to those mentioned. 



Crown slightly longer than pronotum, slightly depressed laterad 

 of eacli ocellus. Pronotum of nearly uniform length throughout its 

 width. Fore wings rounded apically. extending to the fifth to eighth 

 abdominal segment ; veins prominent, venation irregular. 



Posterior margin of seventh sternite of female faintly incised 

 medially. Male plates rather slender, tapering slightly from base 

 to bluntly pointed tips. Tips of plates bent upward and diverging 

 slightly. 



Pygofer process of male broad, subtruncate distally, with a very 

 short, toothlike protuberance ])rojecting ventrad from the caudal 

 margin. Aedeagus stout; tip truncate, with two pairs of short, 

 spinelike projections, two extending laterad and two cephalad. Tips 

 of styles hooked upward. 



Dhtrihiition. — Originally described from specimens collected in 

 Oregon by Koebele and one female from Corvallis, Oreg., collected 

 by A. B. Cordley. Of these, a male specimen bearing Baker's red 

 determination label is considered to be the type. In addition to the 

 Oregon specimens I have examined one female from Humboldt, 

 Calif. (H, S. Barber), and males, females, and one nymph from 

 Paradise Valley. Mount Ranier, Wash. (W. AV. Baker). 



ERRHOMUS (ERRHOMUS) MONTANUS (Baker) 



Plate 5, Figxtres 5. 5A 



Errhonieviis montanus Bakek, Psyche, vol. 8. p. 262, 1898. 



Less robust than oregonerifiis, head subangular rather than bluntly 

 rounded. jNIales macropterous. Length of female 7.25-7.75 mm, of 

 male 5.5-6 mm. 



51704—38 2 



