(LITHOCOLLETIS) NOVEMBER, 1859. 77 



tended to the tegulas in front and pointed behind, with the 

 point black-margined on both sides and with the costa black. 

 Four costal silvery streaks, the first oblique but rounded 

 beneath and black-margined on both sides, the others toward 

 the base alone. Three silvery dorsal streaks, the first rather 

 broad, oblique, nearly touching the first costal, and black- 

 margined on both sides, as also the second ; the third only 

 toward the base. A streak of black scales in the middle of 

 the wing at the apex, extended backwards between the 

 streaks to the second dorsal and costal. Hinder-marginal 

 line blackish, with a violet metallic hue ; cilia dark fulvous. 



The larva mines the underside of black thorn* during 

 September and October. The mine is usually limited by 

 two veins of the leaf. The larva is cylindrical, with a very 

 pale brown head; the body yellowish, coloured dark green 

 by the ingesta. The imago appears in April and May. 



15. L. hamadryadella. Front, tuft and thorax white. 

 Antennas white, annulated above with blackish. Fore-wings 

 white, with an angulated, shining, ochreous band, rather 

 behind the basal third of the wing, black-margined internally 

 with dispersed scales; a broad angulated band of the same 

 hue, behind the middle, black-margined internally with dis- 

 persed black scales, produced in the middle, so as to divide 

 it into two portions, with the space between the bands some- 

 what suffused behind the second with ochreous-saffron, and 

 an irregular line of blackish, dispersed scales through the 

 middle of it. Near the tip is a costal and dorsal ochreous- 

 saflron spot, with the white space between these and the 

 second band dusted with blackish, with the apical portion 

 white, dusted with black scales, and connected with the patch 

 before it by a line separating the costal and dorsal spots. 

 The basal portion of the wing somewhat dusted with black, 

 with a small blackish patch on costa near the base, and two 



In Asa Gray's Manual of the Botany of the Northern United States, the 

 name of "Black or Pear Thorn" is assigned to Cratcegus tomentosa. 

 H. T. S. 



