8388 Insects. 



Sp. 1. Lithosia cereola. [No British example]. 



Sp. 2. Lithosia unita. 

 Le manteau jaune, Geoff, ii. p. 192 (1762) ; Engr. 219, a, b, c= Unita, 

 Wien. Verz. C. 2 ; Esp. pi. 93, fig. 6, 7 ; J5or&. 80 ; l^m. 

 iVew. il/«^r. ii. p. 212 ; Schr. 1505 = Aureola, Hb. 98 ; God. p. 

 395, pi. 40, fig. 5 ; Ochs. iii. p. 140 ; Bdv. Icon. p. 107, pi. 58, 

 f. 2 ; Sfapjfc. p. 94, pi. 18 ; Wood, 96 ; Fretj, pi. 380, fig. 3. ; 

 Herr.-Sch. p. 158 = Luteola, View. No. 4 = Aurantia, Haw. 

 p. 147, No. 5. 

 Alae anticae wide ochraceae, unicolores, costa valde convexa ; sub- 

 tus atro-griseae, margin e luteo, vittaque costali usque ad medium 

 (in mare) lutea. Alae posticae dilutiores ulrinque immaculatae. 

 Thorax vivide ochraceus ; abdomen griseum, ano luteo; cor- 

 pore subtus pedibusque nigris. Fo3mina paullo minor. 



This is one of the most widely distributed of onr species, and 

 inhabits almost every country of Europe. It is found [in May, in 

 warm and elevated woods, under the leaves of trees, whence it may 

 be obtained by beating. 



The larva has some similarity to those of L. quadra and L. rubri- 

 collis ; it is, moreover, slightly depressed above, and has shorter 

 hairs than those species, but more than either L. complana or L. 

 caniola, especially on the sides : it is of a yellow-gray colour marbled 

 with dull green, with the usual warts, the hinder ones being larger 

 and of an orange-yellow colour: the dorsal stripe is black; the sub- 

 dorsal stripes waved, and formed by the aggregation of black 

 marblings : on the 2nd, 3rd, 7th and 11th segments the trapezoid 

 markings are obscured with black, and adorned posteriorly with a 

 white dorsal spot. It feeds in August, on the lichens of different 

 trees. 



This Lithosia is clearly L. unita of all the older writers, — a very 

 appropriate name, and one which instantly reminds us of a character 

 which, together with the shape of the superior wings, enables us 

 to recognize the species at the first glance. It has therefore been a 

 great mistake to transfer the name " unita" to another species, and I 

 think it nothing more than just to restore the name as originally em- 

 ployed, without expressing any annoyance at the trouble of making 

 this alteration in our collections. We may also observe that the 

 name " unita," taken from this species, has not been subsequently 

 employed with any uniformity. 



