506 Mr. A. Quail on 



by sharp-pointed spines, of wliicli I do not know the like 

 elsewhere among Hcpialichv. I erred in placing hacotii in 

 the genus Gorgojns ; although both are highly specialized, 

 as regards the antennae the structure is so different. 



The antenna3 of Forma are interesting. Viewed from 

 the side clavola segments are apparently uniform, with 

 shght ventral extension, " sense " hairs encircling the 

 anterior rim of the segment, and others gatliered over a 

 ventral posterior area; a transverse view shows the seg- 

 ments are somewhat quadrangular with posterior append- 

 ages ; viewed from above, the lateral angles of the quad- 

 rangular figure appear now to be the tips of lateral 

 bipectination, and the shaft of the segment is small and 

 constricted. The appearance of pectination is greater 

 beyond the middle of the antenna, where the shaft is 

 smaller and the lateral eloucrations are longer, still how- 

 ever preserving the quadranguhar form transversely; the 

 apical segment presents a much-specialized structure. 



Pori7ia fnscomaculata has an antenna which in tlie ^ 

 has complete bipectination, which supports our view of 

 the specialized form being Uke Gorgopis ; on the ventral 

 surface there is, however, a " sensory " tubercle which 

 brings this definitely bipectinate Poriiia in line with the 

 other species of the genus. The biistles appear to be 

 always placed irregularly on the different segments of the 

 clavola in Ilepiaiid/v, and P. fuscomaculata is a convenient 

 species to examine in this connection. On the dorsum of 

 1st clavola segment are some half-dozen bristles (slender) ; 

 2nd has several slender and one large bristle on dorsum, 

 and one laige bristle on one of the pectinations ; 3rd, four 

 slender bristles on dorsum, two large bristles on one 

 pectination ; 4th, two slender, two large bristles, on 

 dorsum ; 5th, one slender bristle middle of dorsum, one 

 near pectination, three large bristles at intervals on pectin- 

 ation, and two ditto on opposite pectination ; 6th, two 

 slender bristles on dorsum, four large on pectination, one 

 on opposite pectination ; 7th, one slender bristle in front, 

 one large one at middle of dorsum, three large on one 

 pectination, one on opposite. In addition to large bristles 

 placed irregularly on the pectinations, succeeding seg- 

 ments have on the dorsum of shaft, one large bristle on 

 8th ; next has two large bristles, then three segments have 

 one bristle each; next has two bristles; thirteen consecutive 

 segments have one bristle each ; next has two ; next one ; 



