256 PREDACIOUS AND PARASITIC 



2. — -Vertex without a distinctly raised carina, third 

 and fourth joints of antennae together longer 

 than the second. 

 3. — Male more parallel-sided and elongate than the 

 female, femora pale, spotted or lined with black, 

 or surface clothed with silvery white hairs. 

 4- — Surface clothed with silvery hairs ... ... Albipennis. 



5- — Surface not clothed with silvery hairs. 



6. — Femora margined with black ... ... Arbustorum. 



7. -Femora spotted at apex, but not margined with 



black ... ... ... ... Viridulus. 



8.-— Male and female, nearly alike in shape, femora 

 dark or red, upper surface not clothed with 

 silvery hairs. 

 9. — Spines of tibiae strong and black, arising from 

 black spots. 

 10. — Base of corium pale ... ... ... Bohemani. 



II. — Elytra entirely dark. 



12. — Larger, a pale spot near each eye ... ... Nigritulus. 



13. — Smaller, head entirely black ... ... Pulicarius. 



14. — Tibiae, with fine black spines not rising out of 



black spots. 

 15. — Base of the elytra pale ... ... Saltitans. 



16. — Base of elytra concolorous with the rest ... Wilkinsoni. 



P. albipennis, P. arbustorum, and P. viridulus are the com- 

 monest species, and I think it likely that all are aphidivorous, 

 though definite proof has only been obtained in regard to the 

 second species. I have been unable to secure any specimens 

 which could be certainly identified as the larval and nymphal 

 stages of P. arbustorum, but the imago is shown on PI. XIII. at 

 Fig. I. The antennae and the characteristic tibiae are given on 

 PI. XIV. at Figs. I, 2, and 3. 



The colour of my specimens, as I have already mentioned, is 

 ochreous throughout, with some points of deeper orange, and 

 hairs, spines, parts of antennae, etc., black or very dark brown. 

 The external anatomy of the imago differs in some important 

 respects, besides the more elongated shape, from the Capsid last 

 considered, and the following points are of interest : — 



