132 



ME. R. m'lachlan on new fojrms, etc., 



busto ; penis cylindricus, paullo sursum incurvatus ; apice inerassato, 

 bifido, infra uncis duobus latis, incurvatis, acutis instructo. Alae 

 anticae angustatae, elongatae, flavescentes, dense saturate griseo reticu- 

 latae ; striis brevibus, ad marginem inferiorem, fusco-nigris : postica3 

 fuliginosae, venis saturatioribus ( g , ? ). 

 Long. corp. $ 3 lin. ( = 7 mill.), $ 3| lin. ( = 7f mill.); exp. alar, 



10| lin. (=22 mill.), $ 13| lin. ( = 28 mill.). 

 Hab. Nova Zealandia(Christchurch, Canterbury, Fereday) {in Mus. auct.). 

 Blackish. Head and prothorax densely clothed with hoary hairs ; an- 

 tennas fuscous, with indistinct paler annulations, and with the oblique 

 blackish streak on each joint of the basal portion usual in species of 

 this genus. Mesothorax, metathorax, and abdomen black or blackish, 

 the latter with a broad whitish line along each side, most conspicuous 

 in the $. Palpi and legs testaceous or yellowish. In the S the 

 terminal dorsal abdominal segment bears in its middle a nearly vertical 

 short lobe, w hich is emarginate or notched : appendices testaceous or 

 yellowish ; from under the last dorsal segment proceeds a shining, 

 semitransparent yellowish lobe, which is deeply excavated in its 

 middle above, the sides deflexed, and the apex angular ; app. sup. 

 apparently wanting ; app. inf. long, cylindrical, directed upwards, and 

 forcipate, the second joint being short, thick, and subobtuse, clothed 

 with short golden pubescence, and with two or three longer blackish 

 hairs; penis cylindrical, directed upward, gradually becoming thinner 

 to the glans, which is dark reddish testaceous and deeply bifid, bear- 

 ing beneath two broad, claw-shaped, acute teeth or hooks, which curve 

 upward. In the $ the apex of the last dorsal segment is bifid, and 

 from beneath it proceeds an elongato-quadrate testaceous lobe, from 

 each side of which springs a long hair ; sides oblique, with a broad 

 obtuse valve on either side. (PI. IV. fig. 16.) 

 Anterior wings long and narrow (broader in the $ ), greyish yellow, 

 thickly reticulated with dark grey, and with several short, almost 

 blackish, streaks on the inner margin, which alternate with yellowish 

 spaces (the grey reticulation and spots are caused by the colour of the 

 pubescence). Posterior wings wings clothed with rather dense smoky 

 pubescence, subhvaline ; the veins darker . 

 This species probably represents No. 14 (from Auckland) in 

 my ' Catalogue of New Zealand Trichoptera? published in the 

 Journ. Linn. Soc. Zool. vol. x. p. 213, and of which I had then 

 only seen one much damaged example. I have since received 

 both sexes, in good condition, from my old friend Mr. Eereday. 



It is a very ordinary-looking insect, of a type common to many 

 European and American species, but should be easily recognized 

 by the form of the penis ; and, in fact, this organ seems to pre- 

 sent the only safe characters whereby to separate many of the 

 species of this perplexing and widely distributed genus. 



