PLATE LXXXVII. 



Callipterus BETULA.RIUS. (Page 14.) 



Fig. 1. — Apterous viviparous female. The abdo- 

 minal tubercles are tufted with capitate hairs. 



Fig. 2. — Apterous oviparous female. The last three 

 abdominal rings are dilated from the presence of an 

 egg ready for extrusion. 



Fig. 3. — "Winged female, showing the great length 

 of the antennse. 



Fig. 4. — Head of the last insect, showing the stem- 

 mata and the two basal joints of the antennse. 



Fig. 5. — Trumpet-shaped cornicle of Fig. 2, with 

 enlarged view of the capitate hairs, the summits of 

 which have each a cavity similar to that shown in 

 Plate XXII bis. These hairs probably are tactile 

 organs. 



Fig. 6. — Caudal appendage of Fig. 3. 



Fiof. 7. — Last three articulations of the antennaB of 

 Fig. 3. The setaceous seventh jomt is obvious. 



