1897.] 115 



A. A. Bristling hair wholly interior to the sliortest line drawn from the end 

 of the subcosta to the end of the postieul nervure ; its endings 

 on the radial branches and cubitus distant from the radial bifur- 

 cation, and approximated to one another in a slightly oblique line 

 with that on the anterior pobrachial, which is the outermost ; its 

 endings on the pobrachial branches and postical nervure disposed 

 in an almost right-angled line with one another, the angle re- 

 entering 26. P.fratercula. 



B. Radius confluent with the cubitus at a distance beyond the anterior basal cell 

 equal to or greater than the cell's apical width. Bristling hair wholly 

 interior to the shortest line drawn from the end of the subcosta to the end 

 of the postical nervure. 



+ Bristling hair on the i-adius extended, if only for a short distance, beyond the 

 bifurcation. 



B. Bristling hair in most parts of the wing extended beyond the shortest 

 line drawn from the end of the subcosta to the end of the axillar 

 nervure ; wanting on the subcosta, preebrachial and anal nervures ; 

 its endings on the radial branches and cubitus distant from the 

 radial bifurcation, and approximated to one another in an oblique 

 or subtransverse line neai'ly abreast of the end of the subcosta. 



h. Endings of the ranks of bristling hair from the anterior radius to 

 the postical nervure disposed in an obtusely, angulate, trans- 

 verse, zigzag line, commencing and terminating opposite the 

 end of the anal nervure, and having the salient angle at the 

 cubitus, the re-entering angle at the posterior pobrachial. 

 Penultimate (15th) joint in the $ antenna spheroidal, not 

 beaked ; 16th small, globular and apiculate or bulbose ; scape 

 densely squammate ; let joint elongate, about twice the 

 length of the 2nd, which is obovoid ; 3rd joint short, subequal 

 to the 4th, and provided with a well-furnished verticil of 

 hair ; 3rd-14tli joints bulbose ; the beaks, stout and tapering 

 to about the 8th joint, become slender, and from about the 

 11th to the 14th filiform : for articular appendages, a dense 

 inner verticil of long, fine, soft hair 28. P. ealiginosa. 



b.h. Endings of the ranks of bristling hair from the anterior radius to 

 the postical almost in a straight line with oiie another, re- 

 ceding successively posteriorly very gradually to a small 

 extent inwards : $ unknown Species No. XIV, Alg. 



B.B. Bristling hair wholly interior to the shortest line drawn from the end 

 of the subcosta to the end of the axillar nervure ; wanting on the 

 subcosta, praebrachial and anal nervures ; its endings on the radial 

 branches and cubitus approximated to the radial bifurcation. 



J? Endings of the ranks of bristling hair on the radial branches and 

 cubitus placed as it were at three corners of a rhombus, 

 having its fourth corner at the radial bifurcation ; the 

 endings of those on the pobrachial branches and postical 



K 2 



