194 MAXDIBULATA. — -TKICHOPTERA. 



four posterior tibia^, in common with Ceraclea, are armed with spurs 

 at the apex alone. 



Sp. 1. nervosa. Nigra, alls anticis griseis, nervis Juscis, postieis hyalinis 

 obscuris, pedihus obscure ochraceis, nebulis obscurioribus. (Long. corp. 4 lin.; 

 Exp. Alar. 11—13 lin.) 



Phr. nervosa. Latreille. — Cer. nervosa. Steph. Catal. 219. iVo, 3635. 



Black : head with a whitish patch of hair between the antennae, the latter 

 spotted with white, especially beneath; anterior wings griseous, with black 

 nervures ; posterior transparent, dull fuscous, with darker nervures; legs 

 obscure ochreous, varied with darker shades. 



Abundant, at the end of May and in the beginning of June, in Bat- 

 tersea-fields, near Hammersmith, Putney, and along the banks of the 

 Thames ; also taken near Killarney, in the Reeks Mountains. 



Genus XXVII— LEPTOCERUS, Leach. 



AntennoB much longer than the wings, especially in the males, slender, not 

 denticulated within, the basal joint shortish and robust : palpi in general 

 very hairy ; maxillary with the basal joint short, the remainder elongate, 

 the terminal one slender, and sometimes apparently divided into a 6th 

 joint : head small, pilose : eyes large, subglobose ; wings long and narrow, 

 rounded at the apex, nervures not very distinct, variable in position, as 

 shown in the sectional divisions: cilia short: abdomen rather long and 

 slender : legs slender : tibia each furnished with a single pair of spurs at 

 the apex alone. 



Larva slender, fleshy, attenuated behind and truncate at the apex ; legs long 

 and slender, the hinder pair especially. 



Leptocerus, hke Ceraclea, is distinguished by having the antennae 

 remarkably long and slender, in some cases exceeding the length of 

 the body four or five times ; the basal joint alone of the palpi is 

 short, the terminal one sometimes very long, and apparently divided 

 about its middle, producing the appearance of a sixth joint ; the 

 wings are long and opaque, with the nervures rather indistinct, but 

 varying in position at the apex, or hinder margin, of the wing : the 

 genus probably requires division, the first and last sections being very 

 dissimilar to each other ; the former one, as containing the type of 

 Latreille's genus Mystacide, might retain that name, while a new one 

 h required for the other. 



