ANDRENID/E. 237 



A. rOSSB, Taixz. {Tnmmerana, Kirb., spinigera, Kirh., 

 exiinia, Smith: stylopized Y&r.'=. picicorni't, Kirh., piclpcs, 

 Kirh.) Black ; head and tliorax rather finely, andthelatter 

 remotely punctured, clothed with brown hairs, face in the 

 c? of the var. spinigera with black or nearly black hairs, in 

 the other varieties and in all the females with brown. 

 Cheeks in the ^ with a distinct angle below the base 

 of the mandible, this in var. spinigera is produced 

 into an elongate spine of variable length, antennsa 

 unusually long in both sexes, third joint in the S much 

 shorter than the fourth, in the ? shorter than the fourth 

 and fifth together, the joints of the flagellum in the cj 

 slightly arcuate ; mesonotum densely clothed with 

 browni.'^h hairs in the black, more sparingly in the red 

 bodied varieties, wings nearly hyaline, basal area of the 

 propodeum finely rugose at the base, somewhat shining 

 towards the apex ; abdomen punctured in the 1^ and 

 shining, finely rugulose but not distinctly punctured, 

 shining in the red varieties of the ? , sometimes entirely 

 black, except the piceous apical margins of the segments 

 (var. Trimmerana and dark form of rosw), sometimes 

 (var. spinigera and rosie) with the first and second segments 

 more or less red in both sexes, and more rarely with the 

 third also red ; in the dark varieties the pubescence is much 

 more abundant, and forms paler bands along the apices of 

 the segments, the second segment in the S bears a patch 

 of longer hairs near its centre ; apical fringe of the $ 

 dark brown, apical dorsal valve not triangularly raised in 

 the centre, generally punctured, but nearly impunctate in 

 some varieties of tho autumn brood (rosx). Segments 

 beneath fringed with long pale hairs, apical ventral valve 

 in the cj emarginato at the apex, except rarely in some 

 varieties of io<ie; legs clothed with brown hairs, scopaj 

 outwardly dark brown, pale beneath. 



L. 10-15 mm. 



Var. Triinmcruna is very common on Sallows in the early 



