6. HALICTUS. 87 



Blackwater, Hants, and once at "Weybridge ; the male has not been 

 fonnd in England. Professor Schenck has forwarded both sexes 

 from Nassau. He considers the male to be the H. interruptus of 

 Panzer ; but, in my opinion, it is certainly distinct from the H. inter- 

 ruptus described in this work. The male here described is that sent 

 by Professor Schenck. 



10. Halictus interruptus. 



JS. ater ; abdomine cylindrico, basi rufa, segmentis margine basi 

 utrinque niveo-albis. 



Halictus interruptus, Smith, Zool. vi. 2167 c? ; Pees Great Brit. 43. 

 Hylseus interruptus, Panz. Faun. Germ. 55. 4 <$ . 

 Andrena interruptus, Panz. Krit. Revis. 196. 



Male. Length 3 lines. — Black ; the face thinly covered with short 

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

 dibles yellow ; the flagellum fulvous beneath and fuscous above. 

 Thorax, the mesothorax shining and closely punctured ; the meta- 

 thorax rounded posteriorly and rugulose ; wings subhyaline and 

 iridescent ; the nervures fusco-ferruginous, the tegulse testaceous ; 

 the base and apex of the tibise and also the tarsi yellow. Abdo- 

 men oblong, cylindric, shining, and finely punctured ; the basal 

 segment red ; the second and third segments, and sometimes the 

 fourth, with an interrupted fascia of white pubescence at their basal 

 margins. B.M. 



There is a specimen of this insect in the collection of the British 

 Museum ; it has the locality Kingsbridge attached, where it was 

 probably taken by Dr. Leach. Professor Schenck believes this to be 

 the male of H. maculatus; but on comparing a specimen forwarded 

 by him with the English one, I found them to be distinct. 



11. Halictus cylindricus. 



H. niger, rufescenti pubescens ; abdominis segmentis marginibus 

 fulvis, intermediis basi utrinque pallidis. Mas abdominis seg- 

 mentis anticis runs, macula media punctisque lateralibus nigris. 



Halictus cylindricus, Smith, Bees Great Brit. 30. 



Thorns. Opus. Ent. 309 ; Hym. Scancl. ii. 140. 

 Hylseus cylindricus, Fdbr. Ent. Syst. ii. 302 ; Syst. Piez. 319. 

 Hylseus abdorninalis, Panz. Faun. Germ. 53. 18. 



Schenck, Nass. Bien. 267. 

 Melitta fulvocincta, Kirby, Mon. Apum Angl. ii. 68 5 • 

 Melitta abdorninalis, Kirby, Mon. Apum Angl. ii. 73 $ var. 

 Halictus fulvocinctus, Ni/land. Notis. ur Stilish, pro Faun, et Flo. 



Fenn. ii. 199. 

 Halictus abdorninalis, Smith, Zool. vi. 2106. 



Female. Length 4-4^ lines. — Black ; head and thorax closely punc- 

 tured, the face thinly clothed with short fulvous pubescence ; the 

 disk of the thorax is similarly clothed, more densely at the sides ; 



