54 THE CANADUN ENTOMOLOGIST. 



paler shade. The whole larva looks like a withered leaf. When dis- 

 covered the little colony were hanging head downwards, supported by the 

 two abdominal feet, and giving themselves a slight swaying motion with 

 the free portion of the body (not unlike that we see in some pendulous 

 pupae), the resemblance to a dead, half-fastened leaf, preparing to fall 

 with each stronger gust of the autumn wind, was heightened. JMy at- 

 tempts to rear the colony were frustrated by their escape, and before a 

 drawing could be made, which I intended. Belonging probably to the 

 Ejmomidce, these larvae were remarkable for their mimicry of dead leaves. 

 The larvae of the Geometridce are often very interesting from their bizarre 

 forms and singular ornamentation, which, of all the groups of moths 

 known to me, most nearly resembles that of the curious^ forms among the 

 higher Butterflies. 



C. Two Gray Species of Lithophane. 



For the synonymy of this genus see Grote, Check List, p. 38, 1876. 

 It is called incorrectly Xyllna, whereas Xylena, Hiibner, has for type 

 Hadena Uthoxylea. These little JVoctuidce hibernate in the moth state, 

 inhabiting the north temperate regions. We have a number of species, 

 among which are two purely light gray forms, L.faghm Morr., and L. 

 Georgii Grote, besides the darker gray and stouter series of L. afitetmata 

 Walk., L. laticinerea Grote, and L. Grotei Riley { = cinej-osa Gr., n. b. 1.), 

 and which series is considered varietal by Professor Riley, and one of 

 distinct but nearly related species by myself, I first separating and 

 describing them. 



Lithophane fagina Morr. 



This species differs by the obsolescence of its markings, which gives 

 the primaries a somewhat narrower appearance, and recalls those of 

 CucuUia. A white shade, more purely white and more extended than in 

 any other species of the genus, extends along costa to apical third. The 

 customary markings are lost or barely indicated by Iiair streaks of black 

 scales. The veijis are marked finely in black. The series of cuneiform 

 marks forming the subtcrminal line can be faintly made out on the shin- 

 ing gray concolorous wings ; the stigmata are lost ; hind wings pale 

 smoky gray with whitish fringes, reflecting tlie irregular smoky mesial 

 band and thick discal mark from the under surface, which is paler than 



