ON A MARINE CADDIS-FLY. 309 
(without teeth or spines), and present nothing unusual in form ; 
the claw very long and curved. Abdominal segments having the 
sides nearly parallel, apparently bright yellow in life ; terminal 
segment dilated, its posterior margin angular and notched in the 
middle. Anal claw very short, piceous, much curved, and seated 
on a strong protuberance ; on either side of the posterior margin 
of the anal segment is a tuft of very long black hairs. I can 
discover no trace of stigmata in the larva in its present condition, 
and the respiratory filaments are rather uncertain ; but there are 
distinct traces of bundles composed of three or four short fila- 
ments on either side of the ventral surfaee of the first and 
second abdominal segments; on the other segments I cannot 
define traces of filaments. 
(iii.) On the same slide are disconnected fragments of what 
Prof. Hutton assumed to be the perfect insect. Here he was a 
little mistaken. The fragments are those of a male pupa which 
had died before transformation, probably from being without 
anything in the jar of water up which it could crawl into the open 
air for metamorphosis. All the fragments show the transparent 
pupa integument enveloping the perfect insect, which was fully 
formed and ready to emerge. Ordinarily it would be almost 
impossible to identify a species from such fragments. The man- 
dibles are very long and strong, sickle shaped. but considerably 
dilated at the basal articulation (they are more formidable 
structures than are often seen in Trichopterous pups). But 
neither these, the antennee, nor the unexpanded wings would 
have given any clue had the maxillary palpi not rendered identi- 
fication both possible and certain. These organs prove that the 
New Zealand marine Caddis-fly isno other than P&zlanisus 
plebejus, Walker(=Anomalostoma alloneura, Brauer), a species in 
which the maxillary palpi of the male present a remarkable and 
unique conformation of the second joint, which is very long, 
curved, and having the insertion of the third joint placed consider- 
ably before its apex. (In the female the second joint is also long ; 
but the third joint is inserted, as is usual a¢ its apex.) 
So far this is a very satisfactory conclusion to arriveat. But 
Philanisus plebejus is already known from several localities in 
New Zealand ; and one would like to know if it is always found 
on the sea-shore. The other locality-records give us no informa- 
tion on this point. | 
The insect was first noticed (I can scarcely say “described ”) 
by Walker in 1852, in Part I. of the ‘ Catalogue of the Specimens 
of Neuropterous Insects in the Collection of the British Museum,’ 
p. 115, asa new genus and species which he termed Phzlanzsus 
plebejus, indicated as from ‘New Zealand, Dr Sinclair.” Walker 
made no mention of the extraordinary formation of the palpi; his 
diagnosis is very vague ; and he placed the insect in the family 
Hydropsychide. In the Neuropterous portion of the ‘Reise der 
Novara, published in 1866, Dr. Brauer gave a very detailed and 
full description, with excellent figures, of the same insect, under 
