1889. 



THE YOUNG NATURALIST. 



their method of feeding, the larvae of the first brood being practically 

 internal feeders, and those of the second (summer) brood, practically, 

 external feeders. 



This genus is thus characterised by Wallengren, according to Dr. 

 Jordan, "Entomologist's Monthly Magazine," Vol. VI., p. 120: — 

 "Antennae of both sexes with very short cilia. Forehead adorned 

 with a more or less elongated tuft. Palpi longer than the head, 

 rather rounded, slightly ascending, with the last joint more or less 

 elongated, sometimes a little drooping. Legs longer, slender, the 

 tibiae sometimes slightly thickened towards the apex. First pair of 

 spines in the posterior tibiae slightly unequal, second pair almost 

 equal, shorter than the shortest spine of the first pair. Anterior 

 wings not divided to the third part of their length, the segments 

 broad, the posterior segment almost hatchet-shaped, the posterior 

 angle of both segments well marked. The segments of the inferior 

 wings more slender, the third division with the anal angle sufficiently 

 marked, but nearer to the base. The anterior wings flat, covering 

 the inferior when at rest. The veins of the anterior wings ten in 

 number ; 1st and 2nd separate, coming from the base, the 3rd from 

 the posterior margin of the cell, the 4th and 5th from the posterior 

 angle of the cell, all running into the posterior segment, the 6th com- 

 ing out near the anterior angle of the cell, and running into the pos- 

 terior angle of the anterior segment, the 7th two-branched, coming 

 out from the anterior angle of the cell, and running into the apex of 

 the anterior segment, the 8th and 9th coming out from the anterior 

 side of the cell and running into the anterior margin of the wing, the 

 10th coming from the base and ending almost in the middle of the 

 anterior margin. The cell well marked, with a very slender little 

 transverse vein, almost straight, closed. Veins of the posterior wings 

 three in number ; the 1st coming from the base, two-branched running 

 into the anterior segment, the 2nd three-branched, running into the 

 second division, and the third simple, running into the third division. 

 No cell." 



In this genus, the first two species are so closely allied that Prof. 

 Zeller suggested, and Lord Walsingham (" Pterophoridae of Cali- 

 fornia," &c.) appears to have agreed with the idea that the two species 

 really were not distinct, and Dr. Jordan, in the " Entomologist's Monthly 

 Magazine," Vol. XVIII., p. 75, discussed the same matter at some 

 length, Mr. South, "Entomologist," Vol. XVIII., pp. 280-282, tak- 

 ing up the views propounded by these authors, attempted recently to 

 convince lepidopterists that they were one and the same species. 



