ceropalinae: tribe ceropalini 247 



May 20 at Falls Church, Va.; May 28 at Tabor, Alberta; June 1 at 

 Forest Grove, Oreg.; Sept. 30 at Ulkiah, Calif.; Oct. 3 at Ann Arbor, 

 Mich.; Oct. 10 at Linglestown, Pa.; Oct. 13 at Jordan, Ont.; and 

 Oct. 24 at Antioch, Calif. Flower records include Ranunculus cali- 

 fornicus, Medicago sativa, Polygonum sp., Eriogonum sp., Aralia 

 sjjinosa, Lomatium sp., Pastinaca saliva, Daucus carota (5 collections), 

 Aster sp., and Solidago spp. (3 collections). One collection is from 

 honeydew of Cirsium lanceolatum. In my own collecting experience 

 the species is rather common on flowers, and may be found on shrubby 

 undergrowth around the edges of or in clearings in woods. 



This subspecies is transcontinental, primaril}'- in the Canadian and 

 Transition Zones. In the far West it is largely replaced by the 

 subspecies stretchii and caenosa, and in the Alberta to Dakotas area 

 by the subspecies rhodomerus. Adults are on the wing mostly from 

 July 1 to Sept. 15. 



le. Ceropales maculata stretchii Fox 



Ceropales stretchii Fox, 1892, Trans. Amer. Ent. Soc, vol. 19, p. 52, 9 . Lectotype: 

 9 , California (Philadelphia) . 



Black. Yellow and rufous markings similar to those of the sub- 

 species fraterna, but the yellow marks more extensive (and never 

 whitish as is frequently the case in fraterna) . The face, clypeus, and 

 labrum of the female never have a median black stripe, the yellow 

 on the front side of the hind femur occupies from the apical third 

 to most of its length, and the yellow bands on the abdomen are 

 very wide. The yellow on the hind femm* may be broken basally 

 into small blotches, yet if these reach basad one third the length 

 of the femur the specimen should be referred to the present sub- 

 species. The first tergite is yellow for about 0.4 its length in the male 

 and 0.6 its length in the female, the two lateral yellow spots of the 

 male being approximate on the midline or fused into a continuous 

 transverse band. 



Intergrades \vith the subspecies/raterna are the rule where the ranges 

 of the two overlap. Females of stretchii are more strongly differenti- 

 ated from those of fraterna than are males, and in many localities 

 where most of the females may be referred to stretchii, most of the 

 males are indistinguishable irom fraterna. 



Specimens (39 cf, 809) : From British Columbia (Keremeos, Lil- 

 looet, Royal Oak, and Vernon); California (Alameda, Angora 

 Peak, Antioch, Bear Valley in the Santa Cruz Mts., Berkeley, Bess 

 Lake, near Boulder Creek in Boulder County, Carmel, mountains 

 near Claremont, Cuyamaca in San Diego County, Gold Lake in 

 Sierra County, Ingleside, Kern Lake to Rock Creek in Tulare County, 

 Lake City, Mill Valley in Marin County, Modoc County, Monterey, 

 Oak Glen Lodge in San Bernadino County, Orick, Pacific Grove, 

 Paraiso Springs, Plumas County, Quincy, Redwood City, Richardson 



