Insects, 603 



below, on the metathorax, rufous ; all the coxae rufous at their apex ; 

 all the femora black beneath at the base, the posterior pair nearly so 

 to the apex ; all the tibia? and tarsi rufous, the posterior tibiae slightly 

 stained within : abdomen rufous, first segment black at the base, the 

 margin piceous, more broadly so at the lateral extremities, forming 

 angular patches ; the margin of the second segment is similar, but 

 rufous in the centre ; the third and fourth margins piceous ; a large 

 macula on the second segment, acute within, a smaller one on the 

 third, an interrupted fascia on the fourth, and a square patch on the 

 fifth, pale yellow ; beneath rufous, the margins piceous in the centre. 

 This insect I consider to be the female of ochrostoma, but hardly 

 feel justified in placing them together. I have taken them in com- 

 pany, at the side of Colney Hatch wood, skimming about a bare 

 patch, in which an undescribed species of Andrena burrows. It is a 

 variable insect. I have described a highly coloured specimen agree- 

 ing with the majority, but smaller ones occur in which the rufous co- 

 louring on the face and thorax is very indistinct, leaving faint traces 

 of the patches described. There is a specimen of this insect in Kir- 

 by's cabinet, numbered 114. This bee is also found on Hampstead 

 Heath. It appears about the middle of June. 



Sp. 19. Nomada Roberjeotiana, Panzer. 



Female, (3 lines). Head black ; margin of the clypeus, labrum and 

 mandibles rufous, the latter piceous at their tips ; antennae rufous, 

 slightly stained behind : thorax black ; collar, tubercles, tegulae and 

 scutellum rufous, also a rufous transverse line immediately beneath ; 

 all the coxae and trochanters black, rufous at their extreme apex ; the 

 anterior femora slightly stained behind at their extreme base, the in- 

 termediate pair black beneath except at the apex, posterior pair black 

 except the extreme apex ; the tibiae and tarsi rufous, variegated with 

 yellow : abdomen rufous, the first segment black at the base, with an 

 angular black patch at the extreme lateral margins, the second seg- 

 ment has lateral, oblong, oval, cream-coloured maculae, the third and 

 fourth segments are nigro-piceous, the third slightly rufous at the 

 centre of the basal margin, with lateral, oblong, cream-coloured ma- 

 culae, the fifth segment has a large square patch of the same colour ; 

 beneath rufous, piceous towards the apex. 



Male, (3 lines). Head black; nose yellow; antennae rufous, scape 

 yellow in front : thorax black ; collar, tubercles, tegulae and scutel- 

 lum yellow : legs reddish-yellow, the posterior femora black at their 

 base : abdomen, first segment rufous, black at the extreme base, the 



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