PLATE cm. 



Dryobius roboris. (Page 71.) 



Fig. 1. — Apterous oviparous female, h represents 

 the egg which she has laid, wliich is not strictly ovate, 

 but inflected at the side. Unlike that of B. croaticus 

 the egg is smooth and shining. 



Fig. 2. — The winged male. The larger wings and 

 lighter body permits more activity than that shown by 

 the female. 



Fig. 3. — Front view of the apterous viviparous 

 female, standing on a leaf, and showing the short 

 proboscis and long hind leg. 



Fig. 4. — Abdominal segments of fig. 2, showing the 

 excerted and curved male organ. 



Fig. 5.* — A leaf of Quercus ilex from Montpellier. 

 The upper surface is occupied by a patch containing 

 about two hundred eggs of Dryobius Croaticus, ranged 

 with a certain regularity, with all their ends turned 

 one way. This patch probably was the work of ten or 

 more females, since several dead bodies of these were 

 found adhering to the leaf. These eggs were all placed 

 upon the upper surface of the leaf, and to protect them 

 from rain they had for a covering an insoluble varnish. 

 Unfortunately I failed in my eff'orts to hatch these 

 eggs in the following spring. 



* This figure 5 should have been drawn on Plate CIV. 



