BEES OF GREAT BRITAIN. 43 



tosulus the punctures are stronger and dispersed. This bee is 

 very generally distributed over all parts of the kingdom. 



24. Halictus nitidiusculus. 



H. niger, glabriusculus ; antennis subtus fulvis ; thorace glabro 

 punctulato, tegulis testaceis. 



Melitta nitidiuscula, Kirby, Mon. Ap. Angl. ii. 64. 23 $ . 

 Halictus nitidiusculus, Smith, Zool. vi. 2103. 10 <? . 



Female. Length 2-3 lines. Black ; the flagellum fulvous be- 

 neath. Thorax obscurely nigro-seneous, the tegulse and ner- 

 vures pale testaceous, the legs more or less testaceous, the tarsi 

 rufo-testaceous. Abdomen sometimes rufo- testaceous, seldom 

 black, very delicately punctured, and shining at the base, the 

 margins of the segments slightly testaceous. B.M. 



Male. Length 2i-2 lines. The face has a fine short white 

 pubescence ; the flagellum fulvous beneath ; the clypeus at the 

 apex, the labrum and mandibles, yellowish-white. Thorax 

 shining, the metathorax rotundate, finely roughened at the base, 

 beyond which it is smooth and shining ; the tegulse pale, the 

 wings subhyaline and iridescent; the base and apex of the 

 tibiae nd the tarsi pale yellow. Abdomen elongate, shining; 

 the three intermediate segments have beneath, on each side, a 

 fimbria of pale hairs. B.M. 



This species is frequently infested with a Stylops ; several spe- 

 cimens have been taken on Hampstead Heath thus attacked. 



25. Halictus interruptus. 

 H. ater, abdomine glabriusculo, segmento primo ferrugineo. 



Hylaeus interruptus, Panz. Faun. Germ. 55. 4. 

 Halictus interruptus, St. Farg. Hym. ii. 288. 32. 

 Smith, Zool. vi. 2167.16. 



Male. Length 2f lines. Black ; the face has a short silvery- 

 white pubescence ; the apex of the clypeus, labrum and man- 

 dibles yellow, the tips of the latter ferruginous ; the flagellum 

 fulvous beneath. Thorax strongly punctured, sometimes a 

 lateral white spot on the collar ; wings hyaline and iridescent ; 

 the metathorax rugose and rotundate. Abdomen elongate, 

 the first segment and sometimes the base of the second red, the 

 three following segments have a narrow interrupted white mar- 

 ginal fascia. B.M. 



