192 BEES OF GREAT BRITAIN. 



apical joint was broken off in his specimen, and the species 

 being rare, he had not the means of comparison with others. 



1, Heriades truncorum. 



H. atra ; abdominis basi transverse carinata, segmentorum mar- 

 ginibus albidis ; ano maris inflexo, inermi. 



Apis truncorum, Linn. Faun. Suec. 1692 ; Syst. Nat. i. 955. 15, 

 fy Cab. Mus. Linn. Soc. ? . 



Kirby, Mon. Ap. Angl. ii. 258. 51 <? ? . 

 Hylseus truncorum, Fabr. Ent. Syst. ii. 305. 9. 

 Megachile truncorum, Latr. Hist. Nat. iv. 52. 3. 

 Heriades truncorum, Spin. Ins. Lig. fasc. ii. p. 9. 



Curtis, Brit. Ent. xi. t. 504. 



St. Farff. Hym. ii. 404. 2. 



Zett. Ins. Lapp, p- 467. 1. 



Smith, Zool.iv. 1447. 1. 



Nyland. Ap. Boreal, p. 271. 4, fy Revis. Ap. Boreal, p. 278. 



Female. Length 3 lines. Black, closely and strongly punc- 

 tured ; the head subquadrate, as wide as the thorax ; the face 

 has on each side a little white pubescence ; the clypeus rounded 

 in front, its margin subserrate ; the posterior inner margin of 

 the cheeks bidentate. Thorax: the wings slightly fuscous, 

 the calcaria and the claws ferruginous, the tarsi fulvous be- 

 neath ; the apical margins of the segments of the abdomen 

 have a narrow snow-white fascia ; beneath densely clothed with 

 yellow pubescence. B.M. 



Male. Length 3 lines. Closely resembling the female ; the 

 face clothed with silvery-white pubescence ; the antennae fili- 

 form, longer than the head ; the abdomen inflexed, the sixth 

 segment has its margin entire ; the seventh compressed, and 

 having on each side a deep transverse fovea ; the basal seg- 

 ments beneath fringed with white pubescence, the third densely 

 so, the following deeply concave. B.M. 



Mr. Kirby mentions the neighbourhood of Brentford as the 

 locality for this species Mr. Trimmer found it there. I have 

 several times in the month of June searched in that locality 

 in vain, but doubtless others might be more fortunate ; it appears 

 to be plentiful near Paris, and is considered on the Continent 

 not at all a rare insect. Three or four specimens were detected 

 in Mr. Ingall's collection, of his own capturing, but he does not 

 remember the precise locality. 



