Hymenoft&ra aculcata collected in Algeria. 203 



Andhena microthohax, Per. 



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

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

 $1. „ „ „ l,iii, 97. {A.E.E.) 



Andrena, sp. ? 



$ 1. Biskra, 12, iv, 97. {A. E. E.) 



Abdomen densely clothed with adpressed 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 sequali, feminas paullo longiore, 

 abdomine nitido segmentis 2-4 apice albo fasciatis fiml^ria anali 

 aurea. Scopis albidis. 



^ 9 . Black, head and thorax clothed with greyish-white hairs, 

 clypeus of i^ 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 ^, with well- 

 defined white bands in the $ , apical fimbria pale golden, scopae 

 white, calcaria and apices of the tarsi pale. 



$ . Clypeus punctured vertex and face above the antennoe striate 

 antennse with the 2nd joint of the flagelluni 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 shining 

 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 punctiired on the apical 

 portions of the segments, ventral valve elongate' slightly Avidened 

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

 stipites largely rounded, the blades of the stipites very concave, 

 sagittcB much swollen at the base. 



$ . Differs from the $ 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 witli 

 only a very few punctures, in* sharp contrast with the more closely 



