2i6 HYMEXOPTERA ACULEATA. 



basal segment rather narrow at the base, hairy at the base 

 and sides, very shining, sparsely and very shallowjy punc- 

 tured, the following segments duller, more finely punctured 

 and clothed with short brown pubescence, forming a 

 distinct apical band, apical margins of the segments in 

 both sexes widely pale, second and third segments in 

 both sexes, the fourth, and often the fifth, in the $ with 

 lateral basal spots of white pubescence, fifth in the ? 

 densely clothed with golden hairs, beneath clothed with 

 long hairs, $ ventral segments glabrous, nearly flat, 

 armature with a round, somewhat concave lacinia, sagittae 

 deflexed, narrow, and pointed; legs black, clothed with 

 golden hairs, $ with the base and apex of the tibiae and 

 the tarsi, pale, the apical joints of the latter piceous, scopse 

 of ? pale golden. 



L. 8-10 mm. 



Very common and generally distributed. 



H. albipes, Kirh. (ohovata, Kirh.). — Exceedingly like 

 the above, but generally smaller, with the pubescence paler, 

 the (J narrower, its face distinctly longer, the propodeum 

 longer, much less rugose, and without the sharply reflexed 

 apical truncature, tarsi entirely pale. 



? ,face slightly longer, propodeum slightly but distinctly 

 longer, more narrowed posteriorly so that the apical 

 truncature is shorter, this is also less sharp and its 

 angles scarcely reflexed, basal area less regularly rounded. 



L. 7-9 mm. 



Common and generally distributed, often occurring with 

 cijliudricus. 



H. malacliurus, Kirhy. — Another species closely 

 allied to cylindricus, but distiuguishable in both sexes by 

 the closely and finely punctured basal segment of tbe 

 abdomen. The c? may be further known by the pale 

 underside of its antennas, by its yellow mandibles and 

 labrum, its more closely puactured mesonotum, and by its 

 projiodeum, which is not truncate, longitudinally rugose 



