LIFE-HISTORIES OF SAWFLIES. 105 
spots on the sides. On the ventral surface the first segment is 
entirely blue-black; the second is of the same colour, with a 
bilobed yellow transverse mark in the centre; the third is similar, 
but having, in addition, a little pale yellow spot on the side; the 
fourth is pale yellow in the middle and at the sides, brown and 
black between; the following segments are rose-coloured, the first 
of these having a black and pale yellow spot at the side. 
The legs are orange-yellow, the two anterior pairs with the 
coxse and lower half of the femora black, the posterior pair having 
only a shining black band on the femur. The anterior tibie are 
without spines, but the intermediate and posterior tibie have 
three past the middle, the first separate, and, farther on, the two 
others together. 
A very fine female example, taken near Haarlem in June, 
1866, by Mr. Ritsema, differs somewhat from the preceding. 
The two lines on the forehead between the insertion of the 
antenne are replaced by a yellow triangular spot. The neuration 
of the wings is normal. The fifth segment of the abdomen is 
ferruginous above, with pale yellow triangular spots at the sides, 
and above, on either side, a blue-black mark. The under surface 
of the abdomen is represented at fig. 12. Lastly, the posterior 
femora have no continuous black band, but only a small black 
curved line beneath. 
Klug states, loc. cit., that he was not acquainted with the male 
of Clypeata; Hartig only mentions with respect to it that the 
abdomen is yellow, with the base black. Ratzeburg describes it 
somewhat more fully, and gives a figure of it. According to this 
author, it differs from the other sex in its whole aspect being 
yellow, the legs being entirely pale yellow, with the exception of 
the bases of the cox, and the abdomen, excepting the base, being 
brown-yellow. As I also never saw the male, I have copied 
Ratzeburg’s figure on my plate 5. 
The eggs I have never seen. Ratzeburg says that Dahlbom 
met with the imagos in Sweden, and also found the eggs on the 
edges of the leaves of the hawthorn, but I do not know where the 
Berlin professor met with this statement: at all events, it is not 
to be found where one would most naturally look for it, namely, 
in the ‘Clavis novi Hymenopterorum Systematis,’ page 38—Lyda 
Hortorum (?), where Dahlbom gives a very short description of 
Clypeata. 
P 
