120 BEES OF GREAT BRITAIN. 



partially so ; the spots on the scutellum of the male frequently 

 disappear ; and a variety is met with, but rarely, in which the 

 rufous spots are replaced by yellow ones. This species may be 

 noticed entering the burrows of Andrena Trimmer ana, A. nitida, 

 A. varia and A. fulva ; its attacks are very general. 



N. rujicornis is perhaps the most universally distributed spe- 

 cies of the genus; it is found in all parts of the United Kingdom, 

 throughout Europe, and also in North America and Canada. 



2. Nomada later alls. 



N. atra, thorace rufo obscure quadri-lineato ; abdomine rufo, 

 segmento secundo macula magna utrinque laterale, reliquis 

 margine postice pallide flavescentibus. 



Nomada lateralis, Panz. Faun. Germ. 96. 20 $ & 21 ? . 



Schaff. Germ. Zeits. i. 227. 5. 



St. Farff. Encycl. Meth. viii. 370. 25. 



Schaff'. Icon. Ins. Ratisb. t. 50. f. 1 0. 



Smith, Zool. \\.Wl. 16<J ?. 

 Nomada melanosoma, Schaff. Germ. Zeits. i. 280. 11 $ . 



Female. Length 3-4 lines. Head and thorax black, the man- 

 dibles, labrum, clypeus and a minute spot above, a line encir- 

 cling the eyes and the antennae, red, the latter have their scape 

 fuscous above, and are as long as the thorax. Thorax : the 

 collar, tubercles, a large patch on the breast, the tegulse and 

 scutellum, red ; four obscure red lines on the disk of the thorax 

 rufous ; the femora, tibiae and tarsi red ; the femora more or 

 less black towards their base beneath, the posterior pair black 

 within, except at their apex ; the coxae and trochanters red at 

 their apex. Abdomen rufous, the base black, the second seg- 

 ment having on each side a large subovate yellow macula, 

 pointed within, the third has a minute yellow macula, the 

 fourth a transverse subinterrupted fascia, the fifth a square 

 yellow patch ; beneath immaculate, or with the margins of the 

 segments slightly piceous. 



Male. Length 3f-4i lines. Head and thorax black, the labrum 

 and clypeus clothed with a silvery-white pubescence ; the cly- 

 peus anteriorly, the face on each side, and a narrow line along 

 the inner margin of the eyes as high as the insertion of the 

 antennae, the labrum and mandibles, yellow, the latter ferru- 

 ginous at their tips ; the scape yellow in front, black behind ; 

 the flagellum rufous, three or four of the basal joints have a 

 dark stain above. Thorax : the disk has a thin clothing of 



