120 APIDiE. 



the flageUum feiroginous, a black dot on four or five of the middle 

 joints, and sometimes a narrow black line on the scape behind 

 Thorax— the collar on each side, the tubercles, a line on the breast 

 in front, the tegula?, scutellum, and sometimes a minute dot be- 

 neath it yellow ; wings as in the female ; the coxae and trochan- 

 ters black, the anterior pair yellow in front; femora terrugmous 

 their extreme base black beneath ; the knees and all the tibiae ana 

 tarsi yellow, and more or less stained with ferruginous. Abdomen 

 as in 'the female ; in rare instances there is an interrupted yellow 



line on the first segni; r»t. ..„'•' 



Mes . . -r - ■■/. -■•»••"■"-. *■'-•?-- 



This is a ver > k o\f ^; " c ,,£ ; JMgj^TSrln July and is the parasite 



of Hal 'i&jji£MJiy?uh-..s anc^u. leucozonius. It is also said to infest 



colonies of Andrena fidvicrus. It has been found near Darenth, and 



very abundantly at Eastbourne and in Sandown Bay, Isle of Wight ; 



it has also been taken at Kemp Town, Brighton. 



10. Nomada baccata. 



N. ferruginea, capite thoraceque nigro variegatis, abdominis seg- 

 mentis albo maculatis. 



Nomada baccata, Smith, Zoul. ii. 604 <$ $ ; Bees Great Brit. 121 ; 



Nyland. Notts ur Stilish, pro Faun, et Flo. Fenn. ii. 230. 

 Nomada beta, Thorns. Opuse. Ent. 98 ; Hym. Scand. ii. 188. 



Female. Length 3 lines. — Head, the ocelli enclosed in a transverse 

 black macula ; in front of the anterior ocellus a black macula 

 descends to the insertion of the antennae, and from each an abbre- 

 viated black line passes down to the base of the clypeus ; the cheeks 

 black. Thorax — three longitudinal black lines on the mesothorax, 

 and a central one runs down the metathorax ; an oblique black 

 stripe runs from the posterior wings to the coxas of the intermediate 

 legs ; the posterior legs have sometimes their base more or less 

 black beneath ; wings subhyaliue, iridescent, with their apical mar- 

 gins slightly clouded. Abdomen — at the base above an irregular 

 transverse black line, frequently forming the letter M ; the second 

 segment has, on each side, a large subovate white macula, somewhat 

 pointed inwardly ; the third segment a smaller macula laterally, 

 the fourth a transverse line, slightly interrupted in the middle, and 

 the fifth a large square white macula. B.M. 



Male. Length 2^-3 lines. — Head and thorax black ; the clypeus, 

 labrum, mandibles, and scape in front white; the scape black 

 behind ; the flagellum red, the joints having a fuscous line above^ 

 darkest towards their base ; the head and thorax above have a thin 

 hoary pubescence ; on the thorax beneath it is shorter but more 

 dense ; two spots on the scutellum and the tegula; rufo-testaceous ; 

 the hgs of a paler red than in the other sex ; wings as in the female. 

 Abd( men pale rufous, the extreme base black ; two miDute white 

 spots on the first segment, frequently obliterated; the second has 

 tvo large spots as in the female, the following segments have elon- 



