ANDEENA. 55 



clothed on the disk with pale yellowish-white pubescence, on the 

 metathorax, sides, and beneath it is hoary ; the floccus at the base 

 of the posterior femora beneath dense, curled, and white ; the 

 scopa on the tibice white ; the inside of the basal joint of the tarsi 

 fulvous ; wings hyaline and iridescent, the nervures and stigma 

 testaceous. Abdomen ovate, subacumiiiate at the apex, thinly 

 covered above with hoary pubescence ; the apical margins of the 

 segments beneath fringed with the same. 



Male. Length 4 lines. — The pubescence hoary, that on the face 

 and cheeks long and white ; the head above subquadrate : the an- 

 tenniB nearly as long as the thorax ; wings as in the female : the 

 legs slender, with the apical joints of the tarsi testaceous. Abdo- 

 men shining, with a thinly scattered hoary pubescence. 



Hah. Canada. 



Both the sexes described are in the best possible condition. 



16. Andrena errans. 



Female. Length 6-6| Unes. — Shining jet-black, the thorax with 

 ochraceous pubescence above. The head with black pubescence, 

 on the face and vertex it is slightly ochraceous, on the metathorax, 

 the thorax beneath, on the sides, and on the legs it is black ; wings 

 fusco-hyaline, the nervures fusco-ferruginous. Abdomen very black 

 and shining, impunctate, the pubescence on the apex obscui'ely 

 fulvous. 



Male. Smaller than the female, but closely resembling it ; the 

 pubescence is similar, that on the clypeus is brownish ; the wings 

 are more clear, being hyaline towards the base, and the nervures 

 are testaceous. 



Hah. Vancouver's Island. Collected by Dr. Lyall. 



This species resembles A. vioina of N. America, but that insect 

 has pale pubescence on the face. 



17. Andrena caerulea. 



Female. Length 4-4| lines. — Blue, the abdomen shining and some- 

 times having a green tint in certain lights. The pubescence on the 

 clypeus brownish, as well as that on the cheeks. On the thorax 

 above the pubescence is ochraceous, on the metathorax it is sooty 

 black, as is also that on the legs ; the floccus on the posterior 

 femora beneath pale ; wings hyaline, iridescent, and slightly clouded 

 at their apex. Abdomen impunctate, with obscurely fulvous pubes- 

 cence at the apex. 



Hah. Vancouver's Island. Collected by Dr. LyaU. 



18, Andrena subtilis. 



Female. Length 5 lines. — Head and thorax black, the abdomen 



