BEES OF GREAT BRITAIN. 21 



^.^ at Kingsbridge, Devon ; two specimens were found amongst a 



J^ collection of British insects taken at and near Bideford in 



^. ' Devonsliire ; it is common in many parts of the South of France, 



j' J but does not apparently occur near Paris, nor is it, I believe, 



^ ^ found in Germany. 







strot: 



us; 



Genus 4. HALICTUS, Latr. 



jJiji Apis, pt., Linn, Sijsi, Nat. i. 953 (17G6). 



,(lij!| Hylaius, pt., Fabr. Syst. Ent, ii. 302 (1793). 



^tp.^ Mehtta, pt., Kirhy, Mori. Ap, AngL i. 138'^*<^ (1802). 



Prosopis, pt., Fabr, Si/sL Piez. p. 293 (1804), 

 Megilla, pt., Fabr. Sysi. Piez. p. 328 (1804). 

 Hahctus, Latr. Hist. Nat. xiii. 364 (1805). 



Lasioglossum, Curtis, Brit. Ent. x. 418 (1834). 



Head subtriangular, not wider than the thorax, the stcmmata 

 placed in a curve on the vertex; maxillary palpi six-jointed, the 

 basal joint longest, each joint decreasing in length to the apical 

 one ; the labial palpi four-jointed, the basal joint longest, as long 

 as the two following joints, the three apical joints of about equal 

 8. length ; the nientum conical, its apex bidentate or emarginate ; 



the labium lanceolate, acute; the paraglossse about tw^o-thirds 



of the length of the labium ; the labrum of the females having 



an appendage on its anterior margin, that of the male simple 



and transverse. The superior wings having one marginal cell, 



gradually narrowed towards the apex ; three marginal cells, the 



^^ first nearly as long as the two following united; the second 



^^lY subquadrate, rather broader than long, receiving the first re- 



i current nervure towards its apex, sometimes uniting with the 



'0us» second transverse cubital nervure ; the third restricted towards 



Bj the marginal. Thorax ovate, the posterior tibiae having a dense 



[lerti. scopa, the interior calear at the apex of the tibise serrated. Ab- 



epiil* domen subovate in the females, and having a longitudinal rima 



lyP^ on the apical segment. The males have their antennae longer 



IS. than in the females, sometimes as long as the body ; their face 



|jit elongate, the clypeus being usually produced, and more or less 



Diatf yellow at its apex ; their abdomen is usually cylindric and elon- 



i\ gate. 



The economy of this genus o? Jndrenidce does not appear to 



ollofff have been ascertained previous to mv own observations being 



Q0^ published in the year 1850 : it is so remarkablv different to that 



