88 ANDRENID.E. 



the metathorax rugose, posteriorly truncate : the enclosed portion 

 at its hase has a sharp ridge behind ; the wings subhyaline, their 

 apical margins slightly clouded, the nervures ferruginous ; the 

 tegulae piceous ; the pubescence on the legs rufo-fulvous, the apical 

 joints of the tarsi ferruginous, and their pubescence beneath fer- 

 ruginous. Abdomen ovate, shining, and delicately punctured, the 

 margins of the segments pale fulvo-testaceous and densely ciliated 

 with fulvous pubescence ; at the base of the second and third seg- 

 ments laterally a line of white pubescence, that on the apex ful- 

 vous. B.M. 



Male. Length 3|-4| lines. — Head and thorax black ; the face is 

 covered with a short white pubescence, above it is pale fulvous ; 

 the clypeus produced, the apex yellow ; the mandibles ferruginous 

 at their apex, sometimes having a yellow spot about the middle ; 

 the antenna? nearly as long as the thorax. Thorax, the disk 

 thinly clothed with pale fulvous pubescence ; the tegulse rufo- 

 piceous and having a yellow spot in front, the wings hyaline, iri- 

 descent and faintly clouded at their apical margins ; the four 

 posterior tibioe at their base and apex, and a line on the anterior 

 pair above, yellow ; all the tarsi yellow, their apical joints ferru- 

 ginous. Abdomen oblong-ovate ; the three basal segments red, the 

 apical ones black, the extreme base of the first segment and the 

 apical margin of the third black ; at the lateral margins of the 

 second and third segments a black dot, and on the basal margins of 

 each laterally a line of white pubescence. B.M. 



Var. a. A black spot in the centre of the second and third segments. 



Var. /3. A broad fuscous transverse stain on the second and third 

 segments, leaving only the margins red. 



Var. y. The apical margins alone red, faintly so in the middle. 



Hylcnus cylindricus of Fabricius is the male., and the oldest name 

 for the species. Mr. Kirby made a distinct species of the male of 

 the description, regarding the dark varieties only as the male ; but 

 the sexes have on more occasions than one been observed " in eoitu." 

 All these varieties belong to one species ; and still more minute 

 ones might be pointed out ; but that will be better done by personal 

 observation of the insects themselves. Hundreds of the males may 

 be captured on fine autumnal clays, on the ragwort. The species is 

 universally distributed, and has been received from Scotland, Wales, 

 and Ireland ; it is found in France, Germany, Austria, Russia, 

 Denmark, Sweden, Finland, and Lapland. 



12. Halictus malachnrus. 

 H. niger, griseo subpubescens, abdomine subtomentoso. 



Halictus malachurus, Smith, Zool vi. 2106 ; Entom. Ann. (1869) 77. 

 Melitta malachura, Kirby, Man. Apum Angl. ii. 67 $ . 

 Halictus cylindricus, Smith, Bees Great Brit. 30, var. 

 llybens malachurus, Schenck, Nass. Bien. 



Female. Length 4 lines. — Head, the face thinly clothed with short 



