Oclisenheimer makes some curious observations respecting 

 our insects ; he says the male caterpillar turns round in his 

 case or sack before changing to a pupa, in order to be able to 

 creep out at the hinder opening; this becomes necessary, I 

 suppose, from the case being firmly attached by the other end 

 to a leaf or tree. He also says that virgin females sometimes 

 lay fruitful eggs. 



Mr. Haworth having permitted me to inspect his cabinet, 

 and having carefully examined the various figures referred to 

 by different authors, I shall now give the result of my labours, 

 in the enumeration of our species. 



1. P. fusca Haw., Steph. 2. pi. 18./ 3. 4.— hirsutella Hiib, 



t. 1 ./ 3.— calvella Och. 

 Mr. Ingpen has found the larvae and pupae in Hornsey 

 Wood and at Highgate, on hazel, sallow and oak leaves, the 

 end of June and beginning of July ; the perfect insect appeared 

 at the latter period : also the beginning of April and in June, 

 on pales at Winchmore-hill. 



2. P. pulla Esp. V. 3. tab. 44;. f. 8. — muscea Haw. — Bomby- 



cella Steph. ? 

 Larger than T. plumella Hiib.; brownish and semitrans- 

 parent. Esper's magnified figure 8* is like Mr. Haworth's 

 specimen, which was taken by himself. 



3. P. radiella Curtis B. E. pi. 332. <?. — plumistrea Haxv. 



P. radiella is found in grassy places amongst Furze on com- 

 mons, at Hampstead, Hertford, Epping and Dartford. 



I have never seen a British example of HUbner's T. jjIu- 

 mistrea ; and the only specimen perhaps in this country of 

 the B. atra of Esper (which Mr. Stephens refers to this spe- 

 cies as well as H'ubner's T. muscella), I took on the summit of 

 the Puy de Dome in the centre of France. Esper's figure of 

 it is admirable; and it is so different in character that it will 

 form a division of our genus, if not a new one. 



4. P. plumella Hiib. t. \.f. 7. — pectinea Haw. 473. 2. 

 Antennae of twenty joints in the male, sixteen having rays 



which appear to be shorter than in P. radiella, the wings are 

 rather browner, and the superior scarcely so broad. 



5. P. pectinella Hiib. t. l.f. 5. — plumea Haw.? 



Mr. Haworth has but one specimen, which is wasted, and 

 wants the cilia ; it is the smallest of the genus, semitransparent 

 and brownish. 



6. P. nitidella Hiib. t. \. f. 6. S -—Haw.—Curtis B. E. 



pi. 332 A, Larva. — Carpini Sc/ir. 



I once beat a male out of the hedge leading to Darent 

 "Wood, in July. The larva I have copied from Hiibner, to 

 show the curious structure of its case. 



T. Bombycella of Hiibner is not a British insect, at least 

 Mr. Haworth's F. muscea is not that insect, as stated by 

 Mr. Stephens. 



The plant is Qyionis arvensis (the Rest-harrow), upon which 

 one of the species, I have understood, feeds. 



