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many styles of these cases are to be found on rocks, bark of trees, 

 beneath the bark of dead trees, and in dead and decaying stems 

 and trunks of trees. Some feed on lichens, others on bark and 

 wood, so far as known. There may be other habits by many of 

 them. I give the habits of the few that are known. 



H. discella Walsm. — "Larvae in an irregular case of silk and 

 grass encrusted with miscellaneous fragments (some of them 

 a])parent]3^ insect remains). On Chetrodcndron, Metrosideros, 

 etc., probably lichenivorous" (Perkins). II. notabilis Walsm. — 

 Larva in a nearly smooth, subcylindrical case bidged in the mid- 

 dle. Among fibrous matter at base of palm leaves. H. partita 

 Walsm. — I bred a specimen from a pupa in a dead twig. There 

 was no case. //. abject a (Butl.) — Larvse in a regular elongate 

 oblong-oval, brown case covered with frass and bits of rotten 

 wood, in dead ieie vine and other sticks. H. hlachbtirnii Butl. — 

 "On more or less decayed koa trunks" (Perkins). "I think it is 

 connected with dead wood" (Blackburn). IL alUtenita Walsm. 

 — Larvte in a broad flat, rounded-oval case coming to a point in 

 front. The case really is not so broad, but has a broad ex- 

 tension on sides and rear made of a single la^-er of round 

 bits of epidermis from the bark, forming a mosaic of the color- 

 ation of the bark of the tree on which it lives, and thus not 

 seen by the casual ol)server. I ha\'e found them on the 

 trunks of living koa, kukui, Boehmcfia and ceara rubber trees. 

 //. trh)tacid(il(i Walsm. — Larvte in a short subcylindrical case, 

 constricted near each end, covered with minute bits of lichen; 

 on and beneath bark of koa trees. II. haclthdla Walsm. — "Larvse 

 on Metrosideros judyniorplia and other trees" (Perkins). H. 

 eanella Walsm. — "Larvse on rocks" (Perkins). //. saccophora 

 Walsm. — "Larva in case on rocks, no doul)t lichenivorous" (Per- 

 kins). //. riciua Walsm. — "On more or less decayed koa trees" 

 (Perkins). II . metrosidereUa Wakm. — "Larvre on Metrosideros" 

 (Perkins). //. montivolans (Butl.) — "Larva in case on rocks" 

 (Perkins). //. liturata Walsm. — Larva in lichen-covered case 

 on rocks, lichenivorous. //. parda (Butl.) — "Apparently con- 

 nected with dead wood" (Blackburn). U. snhcitrella Walsm. — 

 "Larva in case on Clieirode)tdron, Metrosideros, etc." (licheniv- 

 orous?) (Perkins), //. chiloneUa Walsm. — Larva elongate, 

 white, boring in dead Pipturus stems; without a case. H. 

 el-aJia Sw^ — Larva feeds on under surface of fronds of birds-nest 

 fern, in a silken frass-covered tnnnel, also bores the rachis. 



