374 



Alphabetical List of the Palearctic forms of Thyrididae. 



than our figure. — Distributed from Tibet over West, Central and North China to theUssuri district and Corea; 

 feeding by day on Umbellifers. 



.fiyrsusalis. R. myrsusalis Walk. (= elaralis Walk., idalialis Walk., cinereola Feld., scallula G-uen., pyraliata Moore, 



lobata 3Ioo)e, zonula Swinh., radiata Pagenst.) (50 f). Brown, shaded with grey or yellowish to a varying degree, 

 so that the colouring and shading is very changeable, having sometimes even a pink tone. Both wings pencilled 

 with minute brown lines. At the cell-apex of the forewing usually some small hyaline spots which are iniited 

 to form a patch. - — One of the most widely distributed Lepidoptera, occurring throughout Southern Asia, 

 being often abundant, and also throughout the warmer districts of America and in Southern Africa. 



exusla. R- exusta Butl. (50 f). Similar to B. -pallida (50 f), but the costal margin less pronounced white and 



the forewing divided into a large darker basal area, and a narrower and paler marginal area, in which 



ardens. latter the dark peneilluig is more distinct; from Japan, also in India, ab. ardens Bull. (50 f), which flies 

 together with true exusta, is red-brown instead of ochreous. ■ — Continental specimens differ a little from 



erecta. exusta and are named ab. erecta by Leech. 



pallida. R. pallida Butl. (== obliquistrigalis Warr.) (50 f). This small moth, which agrees in size and shape 



with the preceding one, is at once recognised by the broad white costal stripe to the forewing and further 

 differs from R. exusta, together with which it has been placed into a genus "Microsca" , in the pale base of 

 the hindwing. — The type came from Yokohama: as the species is found in Sikkim and Assam, one may 

 assume that it also occurs in China. 



nitens. R. nitens Butl. (= hamifera Moore, marginepunctalis Leech) (5(5 f) is close to the preceding species, 



but the forewing is paler, more whitish olive or whitish brown, with a slight darker suffusion especially behind 

 the cell, with minute darker bars and lines. Diffuse darker bands before, in and beyond the middle, at or 

 just below apex a white pencillated spot. The hindwing with somewhat darker clouds, the proximal band 

 absent. — Widely distributed and variable; from Anterior India and Ceylon to the Solomon Islands in the 

 South and Japan in the North. 



acaciusalis. R. acaciusalis Walk. (= minicula Guen., sordidula Ploiz, rosacea Pagenst.) If all the forms united 



with it really belong to acaciusalis, the species is very variable. It strongly recalls in markings R. pallida 

 Butl., but is larger and its colouring usually paler, often almost white. The dark atoms, especially around the 

 centre of the forewing, are grouped together into chains of spots which run across the wing. Specimens from 

 Burma appear to have the pencilling very poor, while in Sikkimese examples the striation of the hindwing 

 strigatula. is especially abundant. - The Palearctic form, from China, strigatula Feld. (50 f), which we figure, differs 

 from Indian specimens ])articularly in the reduced brown marking on thorax and forewing and increased 

 pencilling. 



Alphabetical List 



of the Palearctic forms of Thyridae with references to the origmal descriptions. 

 * signifies that the form is figured at the place cited. 



acaciusalis Rhod. Walk. Cat. Lep. Hot. Brit. Mus. 19, i 

 albatalis Dix, Swinh. Proc. Zool. Soc. Lond. 188!), p. 

 aperta Hvperth. Leech. Trans. Ent. Soc. Lond. 1880, p. 

 ardens Khod. Bud. III. Typ. Lep. Het. Br. JIus. 3, p. 

 hiacliiori Dys. Oberth. tA. L(5p. Comp. i. 

 iliapliana Thyr. SUjr. Cat. Lep. Eur. (I), p. 19. 

 erecta Uliod. Leech, Entomologist 1889, p. 66. * 

 exusta Rhod. Buil. 111. Typ. Lep. Het. Br. Mus. .1, p 

 tenestrella Thyr. Scop. Entom. Cam. p. 217. 

 guttata Khod. Chriat. Bull. Mosc. 1880 (2), p. 65. 

 gntta Dep. Walk. Cat. Lep. Het. Brit. Mus. 33, p. 825, 



liiridulina Rhod. Pouj. Bull. Soc. Ent. Pr. 1894, p. 186. 

 myrsusalis Rhod. Walk. Cat. Lep. Het. Brit. Mus. 19. p. 892. 

 nevadae Thyr. Oberth. t'A. d'Ent. 8, p. 33. 

 nitens Rhod. Butl. Ann. Mag. Xat. Hist. (5) 20, p. 116. 

 osacesalis Herd. Walk. Cat. Lep. Het. Br. Mus^. 19, p. 964. 

 pallida Rhod. Butl. 111. Typ. Lep. Het. Br. Mus. 3, p. 71. * 

 scitaria Strigl. Walk. Cat. Lep. Het. Brit. JIus. 26, \k 1488. 

 striatalis Hypol. Swinh. Proo. Zool. Soc. Lond. 1885, p. 875. 

 subrosealis Hypol. Leech, Entomologist 1889, p. 66. * 

 usitata Thyr. Rom. M6m. L^p. 6, p. 244. 



