NOTES ON HYMENOPTERA. 93 



the following segments covered with fine cinereous pubes- 

 cent pile; the apical segments frequently more or less 

 abraded. 



Length 4| lines. 



Male. — Head and thorax shining obscure olive, and finely 

 punctured ; the apex of the clypeus white ; the face thickly 

 clothed with hoary pubescence, the cheeks more thinly so. 

 Thorax thinly covered with hoary pubescence; the anterior 

 tibiae, ail the tarsi, the extreme apex of the femora, and the 

 base of the posterior tibiae, pale rufo-testaceous ; wings hya- 

 line and iridescent, the costal nervures and the stigma dark 

 fuscous. Abdomen black, elongate, and widest towards the 

 apex, with a scattered hoary pubescence ; a white pubescent 

 band at the base of the second and third segments ; the 

 apical segment rufo-testaceous. 



Length 3^ — 4 fines. 



It will be seen that the male differs from that of every 

 known British species in having the apical segment of the 

 abdomen pale testaceous; this alone will distinguish it. 



Andrena denticulata.— This rare species occurred at 

 Bournemouth, but it was not taken until it was too late to 

 obtain fine specimens of either sex ; during June and July it 

 would no doubt be found in fine condition. 



Andrena tridentata. — August is the month in which 

 this extremely rare insect appears ; according to my observa- 

 tion it frequents the Rag-wort only. If we refer to Kirby's 

 Monograph, we find a note appended to his description, 

 " taken but once at Melton, near Woodbridge, Suffolk." 

 In company with A. tridentata I found the equally rare A, 

 rufitarsiSf of which species Mr. Kirby remarks, ^' taken at 

 Barham, very rare;" the localities are about eleven miles 



