British Hymenoptera. 237 



? . Generally larger than the J , and, as in other 

 species of the genus, wider. Face clothed with pale 

 greyish pubescence more or less mixed with black at the 

 extreme sides. Thorax punctured as in the S' , but 

 clothed, in fresh examples, with bright brown hairs on 

 the mesothorax and scutellum, and paler hairs round 

 the margins. Metathorax with a well-defined basal 

 area, largely clathrate within, and bounded by a raised 

 line. Abdomen shining, black, punctured, clothed with 

 short, somewhat adpressed, ochreous-grey hairs, apical 

 fimbria black ; the glabrous exposed portion of the apical 

 segment slightly and triangularly raised and rugose in 

 the middle, round the edges shining and smooth. Seg- 

 ments beneath each with a slight central longitudinal 

 depression, strongly punctured, with pale apical fimbria ; 

 posterior femora clothed with white hairs, floccus white ; 

 posterior tibise and tarsi clear testaceous, clothed with 

 golden hairs. Length 13 — 15 mm. 



Hab. A very common species in the spring. 



Mouffetella, K., is a stylopized var. of the <? . This 

 species is most closely allied to bimaculata, but the 

 clear testaceous hind tibiae of the $ , and the dull 

 densely clothed abdomen and the large genitalia of 

 the (? , will readily distinguish it. The sectional cha- 

 racter of the rugose basal area of the metathorax will 

 at once separate it from nigro-cenea and others of that 

 group with which it has a strong general resemblance. 



7. Andrena bimaculata, Kirby. 



Kirby, Mon. Ap. Angl. ii., p. 115 ; Smith, Cat. Brit. 

 Hym., 2nd ed., p. 47 = decorata, Smith = ritrea, Smith. 



Black ; face clothed with sooty hairs, or brown hairs 

 with sooty hairs mixed. Thorax with brown hairs. 

 Metathorax with an enclosed rugose basal area. Abdo- 

 men in both sexes often with two dull red spots on the 

 2nd segment beneath ; ? often with the apex of the 

 basal segment, and sometimes of the 2nd, red above. 

 Scopee of ? with pale yellowish hairs. Legs of S' en- 

 tirely black. 



<? . Head deeply punctured, and densely covered on 

 the face with long black hairs, or in some varieties with 

 brown hairs mixed with black. Mandibles simple at the 

 base. Antennae reaching to not quite the apex of the 



