TRICHOP- 

 TERA. 



IN^EQUJ- 



PALP1A. 



Families in 

 theTRicn- 

 OPTERA. 



CHAPTER III 



CLASSIFICATION OF THE TRICHOPTERA ' 



THE TRICHOPTERA are no longer considered a 

 Sub-Order of the NEUROPTERA, and have been 

 classed as a distinct Order. They are divided into 

 two main groups, according to the relative num- 

 ber of joints in the maxillary palpi of the two 

 sexes, the IN^EQUIPALPIA and the ^OUIPALPIA. 

 Amongst the INVEQUIPALPIA are grouped the 

 families in which the maxillary palpi consist of 

 fewer than five joints in the male, but five joints 

 in the female. 



In the ^EQUIPALPIA the maxillary palpi are 

 five- jointed, and as a rule alike in form in both 

 sexes. 1 



Thus the familes found in Britain are grouped 

 as follows : 



IN^QUIPALPIA ^QUIPALPIA 



Phryganeidce Odontoceridce 



Limnophilidce Leptoceridce 



SericostomatidcB Molannidce 



HydropsychidcB 

 Polycentrop idee 

 Psychomyidce 

 Phi I op otam ida 

 RhyacophilidcB 

 HydroptilidcB 



1 A six-jointed maxillary palpus is a very remarkable feature 

 of a female Anisocentropus (?) sent by Mr. J. Henderson from 

 the Malay States, and mounted in Canada balsam in my 

 collection. 



