938 LORD WALSIXGHAM OX THE [Nov. 26, 



, 36. (2584) GELECHIA PLUTELLIFORMIS Stgr. 



= olbiaella Mill. ; = siewersiellus Chr. (iiec sieversi Stgr., sp. alt., 

 2584-01). 



Gelechia plutelliformis Stgr. Stett. Ent. Ztg. XX. 239 no. 79 

 (1859) l ; Stn. Tin. S-Eur. 141, 147 no. 18, 360 (1869) 2 . Alucita 

 olbiaella Mill. Ic. Ohen-Lp. I. 193-6. PI. 1 1-6 (1861) 3 ; Stn. 

 Tin. S-Eur. 167, 182-5 no. 10 (1869) 4 . Hypsolophus siewer- 

 siellus Chr. Stett. Ent. Ztg. XXVIII. 239-40 (1867) 5 . Gelechia 

 plutelliformis Stgr. Berl. Ent. Zts. XIY. 309-10 no. 91 (1870): 

 Stgr-Wk. Cat. Lp. Eur. 290 no. 1832 (1871) 7 ; Mill. Cat. Lp. 

 Alp-Mar. 326 (1875)"; Hrtm. MT. Miinch. Ent. Yer. IV. 16 

 110. 1832 (1880) !) ; Curo Cat. Lp. Ital. VI. 38 (1882) 10 ; Kouast 

 Cat. Chen. Eur. 155 (1883) u ; Chr. Mem. Lp. Rmhf. II. 158 

 110. 316 (1885) 12 ; Rbl. Ann. KK. Hofmus. VII. 274, 283 no. 56 

 (1892) 13 : XIII. 377, 381 no. 203 (1898) u : XXI. 44 no. 209 

 (1906) 13 : Stgr-Rbl. Cat, Lp. Pal. II. 144 no. 2584 (1901) le . 



Hob. S. SPAIX 1 " 2 ' - 7 ' 10 ' l3 ' 1G . S. FRANCE 3 - 4 ' ^ 10 ' 13 ' 1(i . SE. 



RUSSIA : Sarepta ' 7 ' 10 ' 1G , 23. V. 1866, 1. VII. 1866, 11. VIII. 

 870 (Christoph). POXTUS l3 ' 1(5 . SYRIA lc . TuRA 12 ' 13 ' lc : Tama- 

 mj 1 - 5 ' 8 " 11 : gaXfaa *->'*-": laxa*' 9 : pattasii 3 ' , III-IV 9 ; VI- 

 VIII 5 ' 9 ; IX 5 ; autumn 8 - 4 < n , excl. V 9 -VI * " ; VII 3 ' 4 ' 5 s ; 

 YIII 3- 1> 8- ! )_ IX o < canaries "-"TENERIFE 13 ' 13 : Guimar, 15. I. 

 1898 (ffintz) 1 *', Santa Cruz, 17.1-2. II. 1907, Tamarix 

 gallica, XII-I, excl. 20. 11-17. IV. 1907 (ll r lsm.) ; Monte de 

 Aguirre, 800 m., 21. VII. 1889 (Simony) ls . 



Among a series of fifteen specimens, bred from Tamarix gallica, 

 near Santa Cruz, one pale variety approaches somewhat closely 

 in colour to the Algerian sinuatella, Wlsm. [Ent. Mo. Mag. XL. 

 223 (1904)], but the form of the markings is distinctly that of 

 plutelliformis, which it resembles also in its smaller size. 



The larva feeds on Tamarix gallica, in December and January, 

 the moth flying in January, February, and March. 



Larva, somewhat attenuate to either extremity, greenish 

 yellow, with reddish patches on the anterior portion of each 

 segment, and a few, sparsely distributed, bristly hairs ; there is 

 a single black dot 011 either side of each thoracic somite. Head 

 pale screen ; no distinguishable pronotal plate ; legs and claspers 

 long, blackish. 



In 1859 Staudinger described Gelechia plutelliformis (Stett. Ent. Ztg. XX. 239) 

 from two ? ? bred from larvae taken at Chiclaua, and in 1870 Le described 

 Gelechia sieversi Chr. in litt. (Berl. Ent. Zts. XIV. 309-10), pointing out the 

 differences between the two species, and adopting Christoph's name, apparently 

 overlooking Christoph's description of Hypsolophus siewersiellus (Stett. Ent. Ztg. 

 XXVIII. 239-40). The two species are quite distinct and easity separated: in 

 plutelliformis the dark streak reaches to the base, and is sinuate thus ~^<~*^ , 

 being clearly denned beneath by whitish ochreous, but above it fades away into the 

 ground-colour of the wing; at the extremity of the dark sinuate line is a dark- 

 extension, sometimes separated from it. In sieversi the longitudinal dark marking 

 may be best described as a cuneate streak commencing at half the wing-length and 

 attenuate towards the base, which it does not reach; this streak is sharply edged 

 with whitish above, and slightly beyond its outer extremity, in line with its 



