230 Mr. E. Saunders' Synopsis of 



insects in his last book,* that I do not think I need do 

 more than refer to his remarks, which will be found at 

 the commencement of his description of the species of 

 Andrena (p. 21). I have in some cases changed the 

 names which have hitherto been used, taking always the 

 first name given to the species, whether the description 

 is from a J^ or ? . 



Care should be taken not to mistake the yellow of the 

 pollen on the scopae for the real colour of the hairs 

 themselves. 



(2) 1. Abdomen in both sexes generally more or less 



red, at least beneath ; or large, with the wings 

 brownish. ^ , clypeus white ; J , anal fringe 

 golden Div. I. 



(1) 2. Abdomen black, or sometimes more or less red ; 

 but in the latter case with the clypeus in the 

 ^ black, and the anal fringe of the J dark. 



(4) 3. Metathorax with its basal area largely and 



coarsely clathrate, bounded posteriorly by a 



raised line . . . . . . . . . . Div. II. 



(3) 4. Metathorax with its basal area smooth, or punc- 



tured, or finely rugose ; rarely finely clathrate ; 

 not bounded posteriorly by a raised line. 



(6) 5. ^ larger or medium-sized, without distinct, pale 



pubescent bands at the apices of the abdominal 

 segments ; clypeus not white ; tibiffi entirely 

 dark (except in ClarkeUa, where they are some- 

 times pale at the apex). $ large, with dark 

 ' brown or black apical fringe ; abdomen often 



densely hau-y ; or medium-sized, without either 

 distinct clearly defined apical bands of pale 

 pubescence, or lateral white streaks to the 

 abdominal segments ; apical fringe always 

 dark; tibiae always dark (except in Clarkella), 

 although sometimes clothed with golden hairs. Div. III. 



(5) 6. (J with distinct abdominal bands ; or very small ; 



or with the clypeus white ; or with the tibia 

 more or less pale. J large, with golden apical 

 fringe (labialis) ; or medium sized, with golden 

 apical fringe ; or if with dark apical fringe, 

 then with distinct, well defined, pale apical 

 bands, or white lateral streaks to the abdominal 

 segments ; or entire insect very small ; tibise 

 often pale and translucent. 



(8) 7. (J , head very large. $ with the mandibles pro- 

 duced into a membranous wing beneath ; ab- 

 dominal segments testaceous at the apex . . Div. IV. 



(7) 8. (J , head of normal size. $ , mandibles simple ; 



abdominal segments not testaceous at the apex. 



* ' Catalogue of British H,ymenoptera in the British Museum, 

 2nd ed., pt. 1. Audreuidie and ApidiK. 187G. 



