38 



[Febi-uary, 



cercle de blanchatre aii p61e siiperieur, leqiiel est surmonte d'un pt'doncle gris 

 couronne d'un bouton en forme de chapeaii de champignon a circuit blanc de 

 lait ; \ine tig-e semblable snrmonte le pole : de plus, an milieu de I'ceuf, est une 

 excroissance noire appuyee sur un circuit a fond phis clair." 



The " iJ-ris feme " in this description expresses the colovir of the 

 eggs when first laid. Later on, they become darker and of a brown 

 colour. The phrase " cercle de blanchatre " refers to the suture 

 between the operculum and the body of the egg, which is much more 

 distinct in this species than in Myrmus, and which, as in Myrmus, 

 passes between the two appendages. The "chapeau de champignon" 

 represents the front view of the appendages ; in profile, they are more 

 like those of Myrmus, though not so distinctly suggestive of the 

 question mark. I do not find in my specimens any trace of the 

 '• excroissance noire," unless it refers to the point of attachment of the 

 egg to the leaf, but there is a pair of longitudinal furrows, which are 

 not quite so long or so deep as those of the allied species. 



It will be seen that, notwithstanding the wide difference in size 

 between the imago of the two species, of which Myrmns measures 

 7 to 9 mm., and CJiorosoma 15 to 16 mm., the dimensions of the eggs 

 are almost identical, that of Chorosoma being merely slightly the 

 stouter in build. 



The eggs are attached at the side to a thin stalk of Psamnia 

 arenaria, the plant on which the imago occiu's, and in nature they 

 would, therefore, be placed in a more or less vertical position, with the 

 cephalic end uppermost. 



For the drawings which accompany this paper, I am indebted to 

 the pencil of Miss Bertha Eeid. 



Fig. I. Egg of Mifnavx niiri/m-iiiis, Fall. 



(a) Front view ; (h) Coiihalic end more 



highly magnified. 



56, Cecile Park, Crouch End, N : 

 December ISth, 1911. 



Fig. II. — Fi-ont and side views of egg 

 of Chorosoiiiii ichiUinyi, Schum. 



