, BANKESIA STAINTONI. 207 



is a rather larger and paler insect than B. staintoni, which differs from 

 the former in the shorter wings, their more yellowish tint, and the 

 more extended, and longer ciliations to the antenna; (Heinemann). 

 The original description of alpestrella (excluding the synonymy) reads 

 as follows : 



Alpestrella, Hein., " Schmett. Deutsch. Tin.," p. 20, no. 4 (1870) ; Staud. 

 and Wocke, " Cat.," p. 266, no. 1,331 (18U) ; Frey, " Stett. Ent. Zeit.," xxxii., p. 

 130, no. 43(1871); " Lep. der Schweiz," p. 334(1880); Hartmn., " Mitt. Munch. 

 Ent. Ver.," iii., p. 195, no. 1,331 (1879) ; Sand, " Cat. Lep. Auv.," p. 154, 

 no. 1,331 (1879). Consjjurcatella, Meng., " Stett. Ent. Zeit.," xxii., p. 164 

 (1861); Frey, "Mitt. Schw. Ent. Ges.," Hi., p. 42 (1869). <? . Vorder- 

 fliigel hell silbergrau mit braungrauen Querstricheln und einem solchen 

 Fleckchen am Queraste, die Franzen an der Wurzel dunkel gefleckt, die 

 Fiihler kurz und dicht gewimpert. 3 L. ? . Gelbbraun mit dunkelbraunem 

 Kopf und Thorax und gelbgrauer Afterwolle. 1J L, . . . In Ober-Engadin, 

 im Juli, die Kaupe an den Flechten der Felsen. Der Sack kurz, mit weissen und 

 braunen Flechtentheilen bekleidet. Ein Stiick vom Alpeleck von Wocke hat 

 merklich breitere, an der Spitze gerundetere Fliigel, das Gitter auf den vordern 

 verloschen und die Wurzel der Franzen fast ungefleckt dunkel. Es scheint eine 

 besondere Art zu sein, ich wage aber nicht, es als solche aufzustellen, zumal ihm 

 die Palpen fehlen, die vielleicht abgebrochen sind (Heinemann, Schmett. Deutsch. 

 Tin., p. 20). 



This species is recorded from the Upper Engadine, Zermatt, St. 

 Moritz to Sils, Maloja (Frey), Mont Dore, Auvergne (Sand) ; cases 

 were seen on the rocks about Fusio, the Simplon, Evolena, Arolla, 

 during the last summer (1899) and the species is probably widely 

 distributed (Chapman and Tutt). 



Egg-laying. — The ? emerges from her case and the male copulates 

 with he* whilst clinging to the emergence-end. She then lays her eggs 

 inside the larval-case, packing them securely among the wool detached 

 from the end of her abdomen (Bankes). 



Ovum. — The egg is oval in outline, -Gmm. long, 4mm, wide ; 

 surface smooth and very delicate in texture. 



Case. — The case is somewhat large and coarse, being from 6-8mm. 

 in length and 2-75mm. wide at its broadest part. It is distinctly 

 trigonal in transverse section, composed of three almost equal faces. 

 It is made of whitish silk and is thickly covered externally with coarse 

 sand, but is rather soft in texture, the faces collapsing very readily. 

 The end at which the pupa emerges is not divided distinctly into three 

 flaps or valves, but appears somewhat rounded, the opposite end is 

 rather finely pointed. The pupa emerges to the end of the 6th 

 abdominal segment. 



Habits of larva. — The anterior segments are protruded from the 

 case by a crawling motion, as if the larva were about to creep out, but 

 when the thoracic segments have been exposed the case is brought 

 forward with a jerk, which usually loosens the hold of the third pair 

 of legs (Chapman). [Milliere says " the larva emerges in the summer, 

 and is almost full-fed before the winter. It lives in a little conical 

 case composed of silk and of very fine grains of sand," a statement 

 quite incorrect as to staintoni (consjn(rcatclla), but most probably 

 referring to L. lapideUaJ] 



Larva. — Although the case is 8mm. long, the larva extracted is 

 barely 5mm., possibly in part due to desiccation in preparation for 

 pupation. The head is brown, retractile within prothorax, the latter 

 within mesothorax, and this partially into the metathorax, the darker 

 pro- and mesothorax dark fuscous, the metathorax pale fuscous. These 



