MAEINE CADDIS-FLY FROM NEW ZEALAND. 421 



same insect under the name Anornalostoma alloneura (pp. 15-20, 

 pi. i. figs. 6 A, 6 b), worked out with that care for which he is so 

 well knoTSTi, the examples having been taken at Auckland by 

 Frauenfeld. 



Brauer evidently had suspicions that Anomalostoma might be 

 identical with FJiilanisus, as is indicated at p. 16, and entered a 

 protest against the adoption of "Walker's name in case the insects 

 should prove the same. It is not my intention here to enter 

 into a discussion on the application of the rule of priority ; suffice 

 it to say that I agree with Brauer on principle, but sometimes 

 doubt the practicability of his suggestions. He placed the insect 

 in the family Ehyacophilidse, in which he was followed by me in 

 the Journ. Linn. Soc, Zool. vol. x. p. 214. 



Now that we know the habits of the insect, it is clear that it 

 cannot remain either amongst the Hydropsychidse or the Ehya. 

 cophilidsB. In both these families the larvse construct perma- 

 nently ^.wf/ cases, not movable tubes. The anomalous structure 

 of the palpi, and also the neuration, would suggest the Seri- 

 costomatidsB as a position ; but in this familj the maxillary palpi 

 of the male are not only differently formed to those of the female, 

 but have also fewer joints. In Philanisus the joints are five in 

 both sexes ; therefore I see no alternative other than to consider 

 it an anomalous form of the family Leptoceridse, to which the 

 structure of the larva is not opposed. Perhaps the point on 

 which it is most divergent from any other described species of 

 this family is the structure of the apex of the abdomen in the 

 female, which is produced into a very long, straight, pointed, horny 

 ovipositor (fig. 5) (as in many Hydro- p. g 



psychidsD andEhyacophilid8e,but more 

 pronounced) ; in what way this struc- 

 ture may perhaps be in correlation 

 with the presumably constant marine 

 habitat remains to be seen. 



The importance of Prof. Hutton's ^ . , „ , 



, ■,.,■,.■,,,-,, Ovipositor of female, 



discovery rendered it desirable that a 



detailed account should be given so far as the materials would 



permit. Now that the connexion of this marine larva with Phi- 



lanisus is proved, I hope he, or some other entomologist in New 



Zealand, may be able to give us fuller details ; examples of the 



larva3 and pupae preserved in alcohol are also desirable. 



