i»2i.] 195 



Folkestone. My description of the young larva of hutleri agrees closely 

 with that of the same stage of formicarum^ as described by Newstead. 



This further knowledge enables us to reconstruct the life-history of 

 the insect. Adult females, with ova, are to be found from the end of 

 May till early in July. Young larvae appear in June and Julj^ and 

 maintain a more or less active existence (through more than one stage) 

 until the late avitumn, when they assume an encysted stage (hitherto 

 recognized as X. hrevicornis) and remain enclosed in a thin talc-like 

 shell throughout the winter and early spring. Young adults are 

 apparently in evidence as early as April (^vide Newstead, Mon. Erit. 

 Cocc. ii, p. 19). Some time in May {vide Ent. Mo. Mag. liii, Sept. 1917, 

 p. 209) these 3'oung adults ascend the grass stems, presumably for pur- 

 poses of mating. After fertilization they descend again to the ground, 

 and construct their woolly ovisacs deej) in the crowns of grass or in tufts 

 of moss. 



The synonymy of the species will now read as follows : — 

 Lecanopsis formicarum Newstead, Ent. Mo. Mag. xxix, Sept. 1898. 

 „ brevicorn/'s Newstead, Ent. Mo. Mag. xxxii, March 1896. 



,, hutleri Green, Ent. Mo. Mag. liv, Sept. 1917. 



Exaerefopiis Newstead. — This genus was erected to contain a 

 Lecaniid species with 2-jointed tarsi on the anterior limbs. Such a 

 structure is so fundamentally different from every other genus in the 

 Family Coccidae (which is characterized by the presence of single-jointed 

 tarsi) that it might almost constitute a claim for a subfamily to itself. 

 But, after a careful study of the limbs in the type-species {formiceticoJa), 

 I am inclined to regard the supposed articulation as of the nature of a 

 deep fold rather than as a true joint. This view is confirmed hy an 

 examination of the limbs of the following British species which 1 now 

 refer to this genus. 



Exaerctopus lonyicornis Green. (Fig. 8.) 



Lecanopsis longicornis Green, Ent. Mo. Mag. lii, Feb. 1916, p. 26. 

 Just as Newstead at first overlooked the dimerous character of the 

 anterior limbs of his species, which he originally recorded (Ent. Mo. 

 Mag. 1898, p. 207) as Spermococcus fallax of Giard, so I made a similar 

 error in referring my longico7'nis to the genus Lecanopsis. Subsequent 

 examination revealed the fact that the anterior limb of longicornis is 

 almost identical in form with that shown in Newstead's figure of 

 Exaeyetopus formiceticola. The similarity was so close that I thought 

 it possible that the two species might be identical ; but. Prof. Newstead 



