2. XOiTADA. 117 



Male. Length -1 lines. — Head and thorax black ; the face clothed 

 with silvery pubescence, the clypens, labrum, and mandibles yellow, 

 the latter ferruginous at their tips ; the scape black, having some- 

 times a ferruginous line within ; the nagellum ferruginous, more or 

 less black towards the base above. Thorax — the collar, tubercles, 

 tegulae, and two spots on the scutellum, frequently united, red ; 

 the legs red ; the coxae and trochanters black, except their extreme 

 apex ; the anterior and intermediate femora black at their base 

 beneath, the posterior pair black beneath, except their extreme 

 apex. Abdomen ferruginous, black at the base, the second seg- 

 ment has on each side a large rounded macula, the third a smaller 

 spot or line, the fourth a short stripe and usually a minute dot 

 outside, the fifth a transverse interrupted stripe, the sixth a broader 

 uninterrupted one, yellowish white ; beneath, a minute yellow spot 

 at the apex. B.M. 



Small specimens of the male have usually the scape, coxae, and tro- 

 chanters entirely black. 



This species appears in Hay and is a parasite of Andrena lahialis ; 

 it is widely distributed, but somewhat local. Kirby's var. y of his 

 Apis rujwomis is a female of this species. 



7. Nomada lathburiana. 



N. atra, scutello punctis duobus flavescentibus ; abdomine ferrugineo, 

 fasciis flavis, medio attenuatis. 



Nomada lathburiana, Smith, Bees Great Brit. 125. 

 Apis lathburiana, Kirby, Man. Apum Angl. ii. 183 J . 

 Apis rufiventris, Kirby, lib. cit. 187 $ . 

 Nomada rufiventris. Smith, Zool. ii. 590. 



Thorns. Hym. Scand. ii. 184. 

 Nomada marshamella, Nyland. Kotis. ur Sallsk. pro Faun, et Flo. 

 Fenn. i. 177. 



Female. Length 4—5± lines. — Head and thorax black, the clypeus 

 and a spot above it, the orbits of the eyes, the labrum, mandibles, 

 and antennae ferruginous, the scape black above. Thorax, the 

 tubercles and two spots on the scutellum yellow ; a stripe down the 

 breast in front and the legs ferruginous ; the coxae more or less 

 fuscous, and the posterior femora and sometimes the tibiae having 

 a black stain beneath ; the wings subhy aline, their apical margins 

 having a fuscous cloud, the tegulae reddish yellow. Abdomen 

 ferruginous, the base black ; the apical margins of the first and 

 three following segments rufo-fuscous ; the basal margins bright 

 yellow, attenuated in the middle, the fifth entirely yellow ; beneath 

 ferruginous, the apical margins of the segments more or less black. 



B.AL 



Male. Length 4-5 lines. — Head and thorax black ; the scape of 

 the antennae in front, the face below their insertion, the orbits of 

 the eyes, interrupted at their vertex, yellow ; the labrum and 



