Insects. 2085 



Sp. 4. cavella, Zeller (fig. 8). 



Lithocolletis cavella, Zeller, Linn. Entom. i. 213, f. 19. 

 Lithocolletis Schreberella, Zeller, Isis, 1839. 



Expansion of the wings 4 lines. Head pale tawny. Forehead pale tawny. Palpi 

 whitish fulvous. Antennae white, annulated with black. Thorax pale tawny. Ab- 

 domen fuscous, tipped with fulvous. Legs and tarsi silvery gray. Anterior wings 

 pale tawny, with a white angulated fascia in the middle ; beyond this are three white 

 spots on the costa, and two on the inner margin. The first spot on each margin and 

 the fascia are margined internally with dark tawny ; at the apex is a black spot, and 

 between the two first marginal spots is another not very distinct black spot. In cer- 

 tain lights a pale basal streak is visible : cilia pale, with a brown patch opposite the 

 anal angle, and an arch of black dots round the apex. Posterior wings clear gray, 

 with paler cilia. 



I have a specimen of this species, which I took on the 14th of May, last year, on a 

 low fence near Beckenham. I know no other British specimen. 



Why Zeller should ever have called this Schreberella I am at a loss to conceive, 

 and I cannot state the objection better than Zeller has himself done in the * Linnaea.' 

 " Fabricius speaks of two fasciae and two opposite spots on the anterior wings, whilst 

 our species has only one fascia." 



It looks, at first sight, not unlike a pale ulmifoliella, but the fascia is more angu- 

 lated, and the lower arm of this fascia is longer than the costal arm (this is not suffi- 

 ciently shown in the Plate). The fourth costal spot also differs from that in ulmifoli- 

 ella, not being so close to the apical spot. 



Sp. 5. Spinolella, Duponchel (fig. 4). 



Elachista Spinolella, Duponchel, xi. 535, Plate 308, f. 8. 

 Argyromiges alnifoliella, Bent. Mus. 



Expansion of the wings 3£ lines. Head whitish fulvous. Forehead silvery white. 

 Palpi silvery white. Antennae black, tipped with white. Thorax fuscous, with the 

 sides silvery. Abdomen fuscous. Legs and tarsi silvery white. Anterior wings 

 bright brownish orange, with a silvery white fascia about the middle, slightly curved 

 outwardly ; the basal half of the wing is not concolorous, but it is pale or silvery white 

 on the inner margin and between the costa and the middle of the wing ; beyond the 

 medial fascia are three silvery spots on the costa and two on the inner margin, and at 

 the apex is a black spot, and another black spot is visible in some specimens (in cer- 

 tain lights) between the last inner marginal spot and the opposite costal one : cilia 

 varied silvery white and tawny, according to the colour of the parts of the wing from 

 which they rise. Posterior wings silvery gray, with fuscous cilia. 



Somewhat resembles ulmifoliella, but the spots are of a purer white ; the medial 

 fascia is more nearly straight, and the pale marks at the base do not in the least re- 

 semble a streak, which is well defined in ulmifoliella. 



I have only seen five specimens of this insect ; two of them in my own possession, 

 one belonging to Mr. Logan, one to Mr. Desvignes, and that in Mr. Bentley's collec- 

 tion. My first specimen was beat out of a birch tree near Latham Moss, Stirling- 

 VI S 



