Monograph on Argyresthia. xxi 



shining, palest at the anal angle. Under-side grayish yellow, darkest on the costa 

 from the base. 



" Posterior wings (towards the apex considerably broader than in praecocella) 

 pointed, shining pale gray, with pale grayish yellow cilia. 



" This occurs in Bohemia, near Nixdorf, from May to July, in pine and larch 

 woods (F-v-R.) ; in Saxony, at Dresden (v. Ti.) ; in Silesia, at Probsthainer Spitz- 

 berg, on pine-bushes, at the end of May and beginning of June, not scarce. The 

 natural history of the larva, which lives in the shoots of young pines, rarely on old 

 trees, is given by Ratzeburg." 



This insect resembles praecocella very closely ; and I should have doubted whether 

 our species had not been this, but as we take praecocella always from junipers, and 

 never from pines, I think I am safe in considering it the praecocella of Zeller. It is 

 rather singular that a species so common as illuminatella is on the Continent has not 

 yet been detected in this country. 



Sp. 25. g lab rate lla, Zeller. 

 Argyresthia glabratella, Zeller, Linn. Ent. ii. 293. 



" The much stouter, smooth, not pale yellow, but whitish gray, anterior wings, — 

 and the more acute posterior wings, with longer apices, — distinguish this from illumi- 

 natella. The following larger amiantella, and the often equally large Ocnerostoma 

 piniariella, have almost the same colour of the anterior wings ; the first has also the 

 yellowish hairs of the head ; but in neither of them are any paler and darker rings on 

 the antennas visible, which our glabratella shows tolerably distinctly on the entire back 

 of the antennae. Besides, amiantella has a shining pale gray basal joint to the an- 

 tenna instead of a pale yellow one, and the posterior wings more pointed than in gla- 

 bratella ; and in piniariella the entire antennae are concolorous gray, and the posterior 

 wings likewise somewhat thinner pointed. 



" The size of two females is as that of arceuthina ; the single male is even smaller. 

 Thorax concolorous, of the colour and lustre of the anterior wings. Head ochreous, 

 darker than in illuminatella. Antennae at the basal half rather distinctly annulated 

 brown and white ; towards the apex the rings are obliterated, and the antennae appear 

 shining gray ; in the male underneath serrated ; the shining basal joint is yellowish, 

 in certain directions glittering dirty yellowish white, as well as the smooth shining 

 face, and the palpi — which are as long as the face and rather slender. Legs, like the 

 palpi, unspotted, only the anterior on the left side incline to brown. Abdomen gray, 

 somewhat shining, paler on the belly : ovipositor rather projecting. 



" Anterior wings of the form as in illuminatella, lively shining whitish gray or 

 very light gray ; on the costa hardly somewhat darker, with a scarcely discernible 

 mixture of yellow. The transverse prominence is manifest in two specimens in the 

 same place as in illuminatella ; in the third specimen the disk is even. Cilia yellow- 

 ish gray. Under-side light yellowish brown gray, much less shining than on the 

 upper-side. 



" Posterior wings lanceolate, more acute than in illuminatella, not so long pointed 

 as in amiantella, shining pale gray, with yellowish gray, not shining, cilia. 



" My male specimen, known by the less thin posterior wings and the antenuae 



