BEES OP GREAT BRITAIN. 33 



The male assigned to this species by Mr. Kirby in the Appen- 

 dix to the ( Monographia/ does not belong to it. 



This species is difficult to separate from H . cylindricus : the 

 female differs, first, in being much smaller, and in having the 

 metathorax somewhat differently sculptured : in H. cylindricus 

 the enclosed portion at the base has a ridge behind, which is not 

 the case in H. albipes. The male of albipes may be known by 

 its yellow labruni and mandibles. 



This species is not so abundant as H. cylindricus, but is widely 

 distributed ; it has been met with in Yorkshire, and is numerous 

 in the London district. Mr. Wollaston brought it from Kil- 

 larney. 



11. Halictus prasinus. 



H. capite thoraceque nigro-aeneis, abdomine atro, segmentis 

 marginibus albis. 



Female. Length 4J lines. Head nigro-seneous, the face thinly 

 clothed with griseous pubescence, the clypeus much produced 

 and having a few large punctures ; the mandibles ferruginous 

 at their apex. Thorax nigro-aeneous, finely and very closely 

 punctured ; the tegulse pale testaceous ; the wings fulvo-hyaline, 

 the nervures ferruginous ; the legs have a yellowish-white pu- 

 bescence, that on the tarsi beneath fulvous. Abdomen ovate, 

 highly polished and finely punctured; on the basal margins of the 

 second and third segments is a fascia of very short yellowish- 

 white pubescence ; the pubescence is beautifully plumose, or 

 pectinate ; the apical segments have a scattered short pale ful- 

 vous pubescence, the sides of the anal rima fulvous. 



This species most closely resembles the female of H. lugubris 

 (IcEvigatus), but, independent of the puncturing of the thorax, 

 its colour is olive-green ; the form of the head is also very dif- 

 ferent. The first specimen was received from Mr. Dale, who 

 captured it at Bournemouth ; it has been received from the Rev. 

 W. Little, who found it at Moffat ; and it has also been taken at 

 Hawley, Hants ; its male is not known. 



12. Halictus lugubris. 



H. ater, subpubescens ; thorace pube ferruginea vestito ; abdo- 

 mine nitidissimo, segmentis intermediis basi pallescentibus. 

 Mas, abdominis segmentis intermediis basi utrinque, tarsisque 

 basi, albis. 



Melitta lugubris, Kirby, Mon. Ap. Angl ii. 81. 86 $ . 

 Melitta laevigata, Kirby, Mon. Ap. Angl. ii. 75. 32 $ . 



c 5 



