3 o MORPHOLOGY AND TAXONOMY OF ADULT MALES 



style ; in E. araucariae the structure of the aedeagus is rather complex, with 

 secondary sclerotizations, as will be discussed in the individual description. 



The dermal structures 



The dorsal setae of the genital segment (gts) always consist of a pair of relatively 

 long and stout setae on each side of the median line, usually near the base of the 

 style. A variable number of smaller setae also occurs ventrally on each side of the 

 genital capsule. 



It appears that the structure of the genital segment shows closer relationship of 

 Eriococcidae with Diaspididae than with Pseudococcidae. 



BRACHYPTEROUS MALES 



In this form, a considerable sclerite degeneration in the meso- and the metathoracic 

 regions is apparent, as a result of the considerable reduction of the fore wings and 

 the hamulohalterae. 



Head 



A comparatively large mouth tubercle (mt) is always present behind the preoral 

 ridge. 



Thorax 



All the meso- and the metathoracic structures become greatly reduced. The 

 scutellum is trapezoidal in dorsal view, with the scuto-scutellar suture weak or 

 incompletely developed ; the scutellar ridge is entirely absent. The marginal ridge 

 of the basisternum is slender and partly absent. The suspensorial sclerite is absent, 

 and the metapleural ridge is dorsally reduced. The hamulohalterae if present, are 

 atrophied and without setae or ridges. 



Abdomen 



The glandular pouch and its associated setae are greatly reduced, the total length 

 of the body being 12 times or more as long as the setae. The genital segment is 

 similar to that of the macropterous males. 



APTEROUS MALES 



The form is only represented by the males of Pseudochermes fraxini. The sclerite 

 degeneration is most pronounced. 



The body is spindle-shaped in the general appearance. The head is broadly fused 

 with the thorax ; the simple eyes are absent and the ocelli represented by small 

 spots or tubercles. Almost all the thoracic features have disappeared, except for a 

 short and vestigial pleural ridge on each segment. The legs are comparatively short 

 and stout ; the trochanter with a long apical seta, but apparently without any 

 sensilla. The glandular pouches are entirely absent ; the genital capsule is small 

 and the anal opening minute. 



