The Scottish Xat?iraHst. i6i 



he conclusion that the Glen Tilt Orthezia belongs to an unde- 

 scribed species, which I may characterise as follows : — 



Orthezia Signoreti Buchanan White, sp. n. 



O. OrthesicE urticcs L. persimilis ; antennis brevioribus et propor- 

 tionaliter robustioribus ; tarsis tibiis subsequilongis 5 . 



Very similar in size and general appearance to O. urticce. As in 

 that species the eggs, when laid, are contained in a calcareous bag 

 that projects from the hind body of the 9 , ^.nd in which, after they are 

 hatched, the embryonic larvae remain for some time. The antennae 

 of the embryonic larva is 6-jointed, as in urticcE, but the joints seem 

 to be thicker, and less narrowed at their bases ; the 2nd joint not so 

 much narrowed in comparison with the first, and both with more 

 hairs, the ist having a good many, and the 2nd with 4 on the 

 inner side and at least 2 (near the apex) on the outer ; the last joint 

 has 2 long hairs at the tip, one rather shorter than the other. In 

 length, the 6th joint equals the 4th, 5th, and ^ of the 3rd ; the 2nd 

 equals the 3rd, and the ist equals the 2nd and X of the 3rd. 



The $ larva has 7 joints to its antennae, of which the last joint 

 is the longest, and the second the next in length ; the 4th, 5th, and 

 6th joints are nearly equal in length. 



I have only seen one ^ larva, and that not in good condition ; 

 but as far as I could judge, the antennas resemble in structure that 

 of the ^ larva of urticcB. 



The adult ^ has 8-jointed antennse, the relative lengths of the 

 joints being much the same as in tirticcB, viz., the 8th longest, the 

 2nd nearly as long as the 8th, and the 3d next in length ; the whole 

 antenna is, however, shorter and stouter, and more of an equal 

 thickness throughout, the last joint being conspicuously thicker 

 than in ufticcE, in which the antennae gradually taper to the tip. 

 The tarsus is nearly as long as the tibia, instead of being little more 

 than half the length as in tirtica. 



I have not seen the ^ . 



Orthezia Sigfioreti lives below mosses, and occurs probably over 

 all the northern half of Scotland. In Glen Tilt it was especially 

 abundant, and not least so at an elevation of upwards of 3000 feet, 

 where it lives in the cushions of Rhaconiitrium lanugUiosum. 

 O. urtica is also a Scottish species, but the only specimens I have 

 are from the south-west. (Plate II. fig. i.) 



M. Signoret cites 9 other described species, but thinks that, from the 



