ERIOCERA. 245' 



Head rather large ; front broad, with a more or less conspicuous, 

 often bituberculate gibbosity behind the basis of the antennae ; 

 epistoma short, transverse, often concealed under the basal joints 

 of the antennae ; lips of the proboscis large, projecting ; the palpi 

 rather long, often as long as the head ; the two first joints are 

 generally prolonged, and the fourth is still longer ; the third being 

 usually the shortest ; however, these proportions vary somewhat 

 in different species. E. wilsonii has comparatively short palpi ; 

 the first two joints seem to be prolonged, but the fourth is short. 

 Eyes glabrous, remote above and below. The antennsB of the 

 male are of two kinds : either very long, and much longer than 

 in the female ; or short, and not perceptibly longer than in the 

 female. The long ones again, vary in their length, the nature of 

 their pubescence, and their structure; those of E. spinosa and E. 

 longicornis are the longest, being more than twice the length of 

 the body ; they are similar in structure ; the scapus consists of a 

 subcylindrical, rather stout basal joint, and a very short, annuli- 

 form second joint ; the flagellum is filiform, gradually attenuated 

 towards the end ; the first joint is about as long as the thorax ; 

 the second is a little longer than the first ; the third is about equal 

 to the second and third taken together, and the fourth is still 

 longer than the third ; the joints of the flagellum are beset on 

 their under side, at rather regular intervals, with strong, spine- 

 like bristles, which gradually become softer and more hair-like 

 towards the end of the antenna ; the upper side of the flagellum 

 is glabrous. The antennte of E. unlsonii are about once and a 

 half the length of the body ; the first joint of the flagellum is a 

 little longer than the second ; the whole flagellum on both sides 

 is evenly and delicately pubescent, the pubescence being inter- 

 mixed, towards the end of the antenna, with some scattered 

 longer hairs. The male antennas of the short kind, if bent back- 

 wards, would not reach beyond the roots of the wings (this is the 

 case with E. fuliginosa) ; they are rather coarsely hairy, but 

 without verticils ; the scapus has the ordinary structure ; the first 

 joint of the flagellum is the longest. The antennae of all the 

 female Eriocerse are very much like those of the latter kind of 

 males, and not perceptibly shorter ; a subcylindrical basal joint ; a 

 short second one ; the third joint (first joint of the flagellum) is 

 the longest. In dry specimens four joints of the flagellum can be 

 more or less distinctly counted ; beyond this, the female antenna 



