ICHNEUMON-FLIES — GELINAE : MESOSTENINI 229 



Specimens: 9, Berkeley, Calif., Sept. 29, 1934 (Davis). 49, 

 Davis, Calif., Oct. 11, 1955, Oct. 17, 1956, and Nov. 25, 1956, R. M. 

 Bohart (Davis). 9, Davis, Calif., Oct. 12, 1955, R. M. Bohart 

 (Townes). 29, Davis, Calif., Oct. 19, 1956, R. B. Hewitt (Davis). 

 9, Davis, Calif., October 1954, D. C. Force (Davis). 9, Mill Val- 

 ley, Marin Co., Calif., Apr. 26, 1925, E. P. Van Duzee (San Fran- 

 cisco). 9, "Langlringvet," Calif., Oct. 30, 1949, Joan Linsley (Ber- 

 keley). 9, Putah Canyon, Yolo Co., Calif., Oct. 22, 1947 (Berkeley). 

 9, Tanbark Flat, Los Angeles Co., Calif., June 21, 1956, R. W. 

 Bushing (Davis). 9, Medford, Oreg., Sept. 9, 1950, A. T. McClay 

 (Townes). 9, no data (Townes). 



This subspecies occurs in California and southern Oregon. 



22. Trachysphyrus aridus (Pratt) 



Front wing 4.3 to 7.0 mm. long; clypeus small; sculpture of head 

 and thorax rather strong and dense; frons shallowly concave, sharply 

 rugidose, the rugidosity mostly transverse; temple short, almost fiat; 

 mesoscutum with very fine dense punctures, near margins and notauli 

 with transverse rugulae ; mesopleurum centrally punctatorugulose in 

 male, strongly rugulose in female; basal and apical carinae of propo- 

 deum rather strong, the two carinae well separated; sides of areolet 

 strongly convergent; second recurrent vein moderately long, simply 

 arched; first abdominal segment unusually slender, the postpetiole 

 unusually narrow; ovipositor sheath about 0.44 as long as front wing. 



There are two subspecies, as keyed and described below. We have 

 no intergrades between them. 



1. Hind coxa black; range: INIinnesota to the mountains of California. 



22a. aridus aridus (Pratt) 

 Hind coxa fulvous; range: Oregon, California, and Nevada. 



22b. aridus ocellaris (Pratt) 



22a. Trachysphyrus aridus aridus (Pratt) 



Cryptus aridus Pratt, 1945, Amer. Midi. Nat., vol. 34, p. 618; ?. Type: ?, 

 Nevada (Philadelphia) . 



Male: Black. Face white, the area around clj^peus black; clypeus 

 white or partly white; frontal orbit, stripe at top of eye, stripe on 

 hind orbit, mandible, lower corner of propleurum, stripe on lower 

 front corner of pronotum, stripe on collar, tegula, subtegular ridge, and 

 extreme hind corner of pronotum, white; front of scape fulvous or 

 whitish; palpi white, pale brown apically; front and middle coxae 

 part white and part fuscous; front and middle trochanters white, the 

 first trochanters with a fuscous stripe above; front and middle legs 

 beyond trochanters fulvous, their tarsi brown apically; hind femur 

 fulvous, its base and apex narrowly infuscate ; apex of segment 1 of 



