82 ANDEENIDJE. 



Smith, Zool. vi. 2173 ; Bees Great Brit. 24. 



Nyland. Notis. ur Sdllsk.pro Faun, et Flo. Fenn. ii. 238. 



Thorns. Hym. Scand. ii. 143. 

 Melitta xanthopus, Kirby, Mon. Apum Angl. ii. 78 <$ § • 

 Lasioglossum tricingulum, Curtis, Brit. Ent. x. 448. 

 Hylseus xanthopus, Schenck, Nass. Bien. 281. 



Female. Length 5-5-| lines. — Black ; the clypeus produced and shi- 

 ning, the tips of the mandibles ferruginous ; the disk of the thorax 

 sparingly clothed with rufo-fulvous pubescence, most dense on the 

 postscutellum and in front of the wings ; the disk shining, closely 

 and finely punctured ; the tegulae rufo-piceous ; the wings faintly 

 fulvo-hyaline, slightly clouded at their apical margins, the ner- 

 vures pale ferruginous ; the legs have a rufo-fulvous pubescence ; 

 the posterior tibiae and tarsi, the intermediate tarsi, and the apical 

 joints of the anterior pair rutb-testaceous. Abdomen ovate, shi- 

 ning and delicately punctured ; at the base a little fulvous pubes- 

 cence; on the basal margins of the second, third, and fourth seg- 

 ments is a fascia of white pubescence, the first and second fasciae 

 usually much interrupted in the middle ; on the sides of the anal 

 rim a a little fulvous pubescence. B.M. 



Male. Length 4^-5 lines. — The clypeus produced as in the other 

 sex, having occasionally an obscure yellow spot at the apex ; the 

 antennae rufo-testaceous beneath. Thorax, its pubescence very 

 thin and usually griseous, but slightly fulvous on the disk in very 

 recent specimens ; the wings as in the female ; the legs also are 

 similarly coloured ; the abdomen elongate-ovate, the bands as in 

 the other sex, but having an additional one on the fifth segment ; 

 the apex fringed with some pale yellowish pubescence. B.M. 



This species has been quoted by Walckenaer as the H. fodiens 

 of Latreille ; but the abdominal fasciae are placed on the basal mar- 

 gins of the segments, whereas Walckenaer's insect has them on 

 the apical margins. The male is the Lasioglossum tricingulum of 

 Curtis ; the peculiarities in the form of the maxillary lobes, in which 

 it differs from many of the British species, cannot be regarded as of 

 generic value. An examination of a number of species of exotic 

 Haticti shows that many and gradual modifications of parts must 

 be admitted, or this extensive genus would have to be split into 

 multitudinous subgenera ; at present I prefer separating them into 

 sections : in the last division of the British species are placed such 

 as have the first recurrent nervure uniting with the second trans- 

 verso-cubical nervure. 



This insect is local, and appears to prefer situations on the coast : 

 it is met with plentifully at Brighton, and Yentnor in the Isle of 

 Wight, and has been received from Arundel, Littlehampton, and 

 Hastings ; also taken at Kingsdown, near Deal, in August, and at 

 Southend in June. 



