1897.] 117 



Pobrachial bifurcation adjacent but exterior to tlie shortest line drawn from the 

 axil of the radial fork to the end of the asillar nervure. Of the seventeen small 

 black hair-spots (all within the region of bristling hair) enumerated in the Synopsis 

 (l. c), two or three near the base of the wing are often ill-defined or wanting ; 

 altogether there are reckoned 8, marking the endings of ranks of the bristling hair : 

 1 at the radial bifurcation, preceded by 1 on the radial stem ; 1 on the cubitus near 

 the same bifurcation, and 1 nearer the cross vein ; 1 by the pobrachial bifurcation 

 on the base of the anterior branch, and 1 at the base of the stem ; 1 on the 

 postical near this last bifurcation ; 1 on the axillar nervure adjacent to the fold 

 of deflection, and 1 at the end of the anterior basal cell. The short appressed 

 blackish hairs at the endings of the nervures do not constitute conspicuous spots. 

 Hair of the head and body similar in tint to the lighter parts of the wings ; the 

 tint warmer from some standpoints than from others, and darker on the notum. 

 Legs light yellowish-brown, or tow colour, annulate or banded with dark brown or 

 blackish-brown in sis places, viz. : narrowly close to the tip of the femur ; narrowly 

 at the base, and more broadly in the middle, and close to the tip of the tibia (these 

 annulations are sometimes confluent on one side of the tibia) ; broadly from near 

 the base almost to the apex of the 1st joint, and again throughout the 3rd, 4th, and 

 all but the extreme tip of the 5th joint of the tarsus. 



Beneath the wings in both sexes, at the inner extremities of the subcosta 

 and axillar nervure, on the nameless nervure incurrent from the inner margin, and 

 on the nervures bordering the anterior basal cell, are some very narrow linear scales. 

 Season, June to September. 



Walker's coliection did not contain any specimen of this species. 

 The name \ustulata is applied to this insect in the sense of the old- 

 fashioned English term, " spark-ed," used to describe a spotted cow. 



26. Pericoma i'ratercula, Etn. 

 P. fratercula, ante, 2nd ser., vol. iv, 128, and vol. v, pi. iii, P. 26 

 (detail). 



Pobrachial bifurcation distinctly beyond the shortest line drawn from the axil 

 of the radial fork to the end of the axillar nervure. The fascia and the spot on the 

 axillar, mentioned in the diagnosis {I. c), mark the endings of the ranks of bristling 

 hair, the fascia being, however, completed posteriorly by the declinate hairs at the 

 end of the axillar nervure. The cubitus should have been named, with the radial 

 branches, as contributing hairs to the foremost spot. Apart from the spots, the 

 bristling hair from certain standpoints matches with the light brownish-grey hair 

 of the body and the longer of the hairs of the legs, but from other directions the 

 hair on the notum between the wings is a darker brown. Legs dark brownish, 

 glossed with the lighter colour narrowly at the tips of the tibiae and of the tarsal 

 joints ; with change of posture the gloss is liable to be more diffused, especially on 

 the last four joints in the tarsus. Hair of antennae medium sepia-brown. 



The distribution of scales on the under-side of the wings is limited almost as in 

 P. ustulata ; but there are in addition similar scales, interior to the fold of deflection, 

 on the inner border of the costa and on the posterior mai-gin, as well as some on the 

 mediastinal nervure. Season, May, June, August, and September. 



