British Hymenoptera. 235 



following segments impressed ; segments beneath punc- 

 tured, fimbriated at the apex. 



? . Black ; thorax and apex of the body clothed with 

 bright red hairs ; intermediate tarsi and posterior tibife 

 and tarsi clear testaceous, densely clothed with golden 

 hairs. 



Head dee]oly and closely punctured ; face with white 

 hairs, and a line of velvety pale pubescence near the 

 inner margin of each eye. Mesothorax largely and 

 closely punctured, but so densely covered with hairs 

 that the puncturation is seen with difficulty. Meta- 

 thorax with a well defined basal area, as in the ^ . 

 Abdomen slightly shining, strongly punctured ; 1st, 2nd, 

 and 3rd segments glabrous or nearly so, except at the 

 sides ; 5th and 6th densely clothed with golden-red hairs ; 

 6th with the disk of the glabrous central portion tri- 

 angularly raised ; segments beneath punctured, with pale 

 apical fringes. Length 10 — 11 mm. 



Hab. Very common in April and May, and generally 

 distributed ; it is one of quite the early spring bees ; 

 the 2 is distinct from any other species by the bright 

 red apex of the abdomen ; the ^ is like several others in 

 general appearance, but the testaceous apex of the 

 abdomen and the clear yellow tibige in most cases will 

 distinguish it ; while the clathrate basal area of the 

 metathorax and the strongly punctured abdomen are 

 unfailing structural characters. 



5. Andrena pilipes, Fab. 



Fab., Species Ins., i., p. 474 ; Smith, Cat. Brit. Hym., 

 2nd ed., p. 34. 



Black, clothed with black hairs; pubescence of the 

 thorax in the $ griseous, and the hairs on the under 

 side of the posterior femora and the outside of the scopse 

 in $ white. Wings smoky brown, with their apical 

 margins darker. 



Head and thorax rugosely punctured in the <? , 

 the latter rather more remotely in the ? . Face of 

 the ^ very densely covered with long black hairs. 

 Clypeus in the ? strongly and rugosely punctured. 

 Metathorax in both sexes with a triangular clathrate 

 inclosure at the base. Abdomen subelongate in the <? , 

 suboval in the ? , rather irregularly and rugosely punc- 

 tured ; apex of each segment, except the 1st, impressed, 



