60 apid^:. 



APIDiE, Leach, 



SYSTROPHA, Illig. 



1. Systropha difformis. 



Male. Length 5 lines. — Black and shining. The head much nar- 

 rower than the thorax, the pubescence on each thin and cinereous ; 

 the three apical joints of the antennas convolute, rufo -testaceous, 

 and forming an equilateral triangle ; the head closely punctured, 

 and having an impressed line from the anterior ocellus to the 

 antennas. The mesothorax and scutellum finely punctured ; wings 

 subhyaline, the nervures dark fusco-ferruginous ; the legs obscure 

 rufo-piceous and with thin cinereous pubescence. Abdomen very 

 finely punctured ; the three basal segments with their apical mar- 

 gins constricted ; the second segment much produced laterally, 

 forming a prominent tubercle ; the third segment also produced 

 laterally, but less prominently so ; the second segment has beneath 

 a prominent tubercle, which is wedge-shaped, being narrowed 

 behind, its apex being obliquely concave ; the pubescence on the 

 abdomen sparing and cinereous, that towards the apex above more 

 dense and intermixed with fuscous. 



Hah. Buraiah. 



OSMIA, Latr. 



1. Osmia ephippiata. 



Female. Length 5 lines. — Black, the abdomen shining ; head closely 

 punctured ; the face and cheeks with black pubescence ; on the 

 posterior margin of the vertex and on the thorax above it is 

 ochraceous, on the sides, beneath, and on the legs it is black ; 

 wings fu sco-hyaline, the nervures black. Abdomen very finely 

 punctured, the apical margins of the segments impunctate ; beneath 

 densely clothed with black pubescence. 



Hub. Angara River, Siberia. 



2. Osmia rubripes. 



Female. Length 4 lines. — Black, the legs ferruginous, the coxas 

 and trochanters black. The head closely punctured, and having a 

 thin pale fulvous pubescence, and a more dense patch on each side. 

 The thorax with fulvous pubescence ; wings fusco-hyalinc. Abdo- 



