Hymenoptera actilcaia collected in Algeria. 203 



Andrena microthorax, Per. 



$ 1. Biskra, on Moricandia cincrea, IG, ii, 94. {A. E. E.) 

 ^1. „ on Moricandia arvcnsis, 10, ii, 97. (A. E. E.) 

 ?1. „ „ „ 1, iii, 97. (A.EE.) 



Andrena, sp. ? 



? 1. Biskra, 12, iv, 97. (A. E. E.) 



Abdomen densely clothed with ad pressed pale hairs. 



Andrena nigrocyanea, n. sp. 



Nigra, abdomine cyaneo tincto, maris clypeo albo, nigro bi- 

 punctato, vertice striate, flagelli articulo secundo maris tertio 

 quartoque simul sumptis fere ajquali, feminae paullo longiore, 

 abdomine nitido segmentis 2-4 apice albo fasciatis fimbria anali 

 aurea. Scopis albidis. 



$ $ . Black, head and thorax clothed with greyish -white hairs, 

 clypeus of $ white with two little black discal spots, face of that 

 sex densely clothed with long white hairs, abdomen with the 

 posterior margins of the segments testaceous, 2nd and following 

 segments with lateral fringes of white hairs in the ^J, with well- 

 defined white bands in the 9 > apical fimbria pale golden, scopoa 

 white, calcaria and apices of the tarsi pale. 



$ . Clypeus punctured vertex and face above the antennte striate 

 antennte with the 2nd joint of the flagellum scarcely so long as the 

 3rd and 4th together, the 4th longer than the 3rd and like the 

 remainder of the joints subquadrate : mesonotum slightly sliining 

 finely rugulose and somewhat remotely punctured, wings slightly 

 clouded, nervures brown, propodeal area ill-defined, slightly crenate 

 at the extreme base, and rather smoother than its surroundings 

 which are finely rugulose and hairy; abdomen shining, especially 

 the basal segment, with a slight tinge of bronziness or blue in some 

 lights, 2nd and following segments with very narrow lateral bands, 

 microscopically rugulose and very finely punctured, apical margins 

 slightly impressed and smoother, beneath punctured on the apical 

 portions of the segments, ventral valve elongate"] slightly widened 

 and subtruncate at the apex, armature with the basal angles of tlie 

 sti^iites largely rounded, tlie blades of the stipites very concave, 

 sagitta; much swollen at the base. 



$ . Diff'ers from the ^J in the ordinary sexual characters and also 

 in having the 2nd joint of the flagellum longer than the 3rd and 4th 

 together, the scutellum more shining than the mesoscutum and with 

 only a very few punctures, in'sharjj contrast with the more closely 



