398 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



Humboldt County. The type locality is 8 miles north of Ukiah, 

 in Mendocino County. The female also may have the stigma dark- 

 ened, but this character is slight and apparently unreliable, as 

 three specimens collected in Mendocino County by E. R. Leach 

 have the stigma as pale as in typical Colorado material. The 

 female collects pollen from Ceanothus. 



It is represented in the United States National Museum by 1 

 female from Walnut Creek, Contra Costa County, April 19, 1913 

 (J. C. Bridwell), and by 3 females from Santa Cruz Mountains, 

 Santa Cruz County, April 25, 1913 (Bridwell). 



ANDRENA (MICRANDRENA) MISERABILIS Cresson 



Andrena miserahilis Cresson, Trans. Amer. Ent. Soc, vol. 4, p. 259, 1872 



(female). 

 Andrena bipunctata Cresson, Trans. Amer. Ent. Soc, vol. 4, p. 259, 1872 



(male). 

 Andrena flavoclypeata Smith, Description of new species of Hymenoptera, 



p. 54, 1879 (male). 



There is one male of this species in the United States National 

 Museum from Sacramento, Calif., May 19, 1931 (C. C. Wilson). 

 I have collected it also at a point 3 miles west of Three Rivers, 

 Tulare County, but it is not known to occur in southern Cali- 

 fornia. 



ANDRENA (MICRANDRENA) HAROLDI. new species 



This is most similar to A. piperi Viereck, from which it differs 

 in its somewhat larger size and broader abdomen ; in having the 

 mesoscutum less opaque, it being tessellate instead of granular; 

 and in having the abdomen devoid of the appressed light 

 pubescence which is characteristic of piperi. This species was 

 studied by Viereck, whose manuscript name I have adopted. Vie- 

 reck associated males of piperi with the female of this species, and 

 the true male appears to be one to which he had given another 

 manuscript name. 



Female. — Black, the abdomen with a faint, very dark-green 

 tinge. Mandibles dark red at apex. Flagellum ferruginous red 

 beneath except toward the base. Small joints of tarsi, especially 

 the apical joint, pale ferruginous. Tibial spurs testaceous yellow. 

 Tegulae piceous, becoming more or less brownish testaceous at 

 apex. Wings dusky hyaline, with dull ferruginous stigma and ner- 

 vures. Pubescence dull ochreous, moderately long, and thin 

 enough to expose the integument. Apical fimbria of abdomen 

 brownish fuscous. Tergites 2 to 4 each with a narrow, whitish 

 apical hair band, interrupted medially on 2. Scopa of hind tibiae 

 brownish on dorsal half, whitish below, rather long and mod- 

 erately loose, the hairs on the outer surface entirely simple, and 



