50 HAUSTELLATA. LEPIDOPTERA. 



The width and form of the central fascift on tlie anterior wings varies ex- 

 cessively, as well as the size of the insect. 



C'atcrpiUars glaucous, with three red lines on each side, and a white one down the 

 back : they feed gregariously on various trees, especially oak, hazel, sloe, and 

 fruit trees ; they reside in a common web, enlarging it from time to time, 

 until their separation ; they are great pests to fruit-trees, which are sometimes 

 quite defoliated by them : in changeable weather, I have observed that all the 

 individuals which happen to be resting on the outside of the nest simul- 

 taneously and repeatedly elevate the anterior part of their body, as the larvae of 

 Hylobius Pini are said to do. The pupa of this insect is of a dull lead colour, 

 covered with fine powder : the imago appears in July and August. 



A very abundant insect in the southern parts of Britain, fre- 

 quenting hedges and gardens. " The pest of our hedges, which 

 in some seasons are entirely stripped of their leaves by the larvae, 

 and laid as bare as in the depth of winter." — Rev. L. Jcnyns. 

 " Suffolk."— ir. C. Hcwitson, Esq. 



Genus LVI. — Eutuicha, Huhner. 



Palpi not very long, porrccted, triarticulate, two basal joints of equal length, 

 terminal more slender and obtuse : maxilla short, a little spiral. Antenna; 

 nearly straight, not very short, deeply bipectinated in the males to the apex, 

 which is a little bent, slightly bipectinated in the females : head small : thorax 

 robust, densely pilose : abdomen the same, rather elongate ; more robust in the 

 females: wings; anterior entire, rounded posteriorly; posterior obsoletely 

 denticidated, reversed during repose : legs rather slender, not very pilose, with 

 minute spurs at the apex of the tibiae. Larva cylindrical, with fascicles of 

 hairs down the sides, and a tubercular eminence on the penultimate joint : 

 jiupa short, obtuse, enclosed in an elongate subfusiform loosely-constructed 

 cocoon. 



Agreeably to the principles which ought to guide us in the forma- 

 tion of genera, as noticed in page 38, the present must be de- 

 tached from Odonestis, from which it differs in having the antennie 

 shorter and straighter, and less pectinated, the thorax and abdomen 

 n)ore densely pilose, the palpi less prominent, and, when denuded, 

 with the two basal joints of equal length. 



Sp. 1. Pini. Alis nifo-griseis, fascia lobatd fcrrugined utrinque fused, ante 

 mediitm puncto iriangulari alio. (Exp. alar. $ 2 unc. 7 — 10 lin. : ^ 3 unc. 

 G— 8 lin.) 



Ph. Bo. Pini. Linns.— Olo. Pini. Curtis, i. pi. 7.— Eu. Pini. Steph. Catal 

 No. 5999. 



(.ii iscous : the anterior wings dark-griseous at the base, sprinkled with minute 

 white dots, with a large triangular white spot before the middle, then an ob- 



