76 



DIASPIN./E: MALE. 



MALE. 



The majority of males possess wings, but a few 

 species are apterous, and, exceptionally, both forms 

 occur in the same species. Viewed from above the 



FIG. 12. Male of Mytilaspis pomorum, after treatment with potash, 

 X 70 : a, dorsal ocelli ; 6, ventral ocelli ; c, rudimentary eyes ; d, 

 gena? ; e, prothorax ; /, mesothorax ; g y apodema on mesothorax ; 

 h, scutellum on metathorax; i, spiracles on ventral area ; j, halter; 

 fc, lobular appendage of wing to receive hooked bristle of halter; 

 I, basal portion of genital armature (stylus). The parts indicated 

 by dotted lines are ventral. (See also PI. XXIV, fig. 8.) 



head is more or less triangular in outline, the apex in 

 front usually projects between the antennae ; but its 

 articulation with the thorax is not always clearly 

 defined. The antennas usually consist of ten joints, 

 and are placed closely together at the extreme margin 

 in front; each joint is generally provided with fine 



