OF THE FAMILY COCCIDAE 49 



Segment VIII with transverse tergite and a very large transverse sternite ; caudal extension 

 forming a small, simple lobe ; glandular pouch with 2 long, pointed setae, whose protruding 

 part is about twice as long as section within pouch ; with 3 h.s. on each side near pouch. 

 Ante-anal area expanded, with 1-2 (average 1 -8) strong h.s. and sometimes with indications of a 

 small IX tergite. 



Genital segment. Penial sheath long, about ? total borly length (ratio 1 : 3-2-3-6, average 

 34), 456-597 (average 530) [i long and 43-53 (average 48) |j. wide ; the basal area anterior to 

 the aedeagus about twice as wide as rest of sheath ; lateral sclerotizations not joined anterior 

 to anus ; length of basal rod about | - ^ that of aedeagus, the rod extending anteriorly from 

 base of aedeagus for about £ of the distance to the apex of basal membranous area ; apex of 

 sheath without membranous extension. The area from base of sheath to tip of aedeagus with 

 23-36 (average 29) small setae ; a cluster of small sensilla occurring ventrally near apex of 

 sheath. Aedeagus long (285-380, average 342 \i), penial sheath longer and basisternum shorter, 

 ratios being 1 : 1-49-1-61 (average 1-55) and 1 : 0-43-0-54 (average 0-49) respectively. 



Material examined : 10 specimens, collected by J. Rehacek on Picea sp. on 

 12.iv.53 in Plesivec, Czechoslovakia ; remounted from Swann's mountant. 



P. piceae (Schr.) differs from P. insignicola (Craw) in having only 2 pairs of simple 

 eyes. Moulton (1907) found 4 pairs in P. insignicola. P. piceae is also described 

 as having 2 pairs of eyes by Jancke (1955). 



RHODOCOCCUS 



Rhodococcus spiraeae (Borchsenius) 



(Text-figs. 8 and 9) 



A short, robust species with comparatively long antennae and moderately long legs ; with 

 numerous setae on the appendages, but few on the body itself. When mounted, total body 

 length 1500-1600 (average 1557) \i ; width at mesothorax 400-420 (average 411) jz. Wing 

 expanse 2860-3000 (average 2940) [i. 



Head subcorneal in dorsal view ; in lateral view obliquely dorsoventrally elongated, with the 

 the anterodorsal bulge not pronounced ; length from apex to pronotal ridge 198-213 (average 

 206) [x, width across genae 194-232 (average 217) \i. Median crest broad posteriorly, weakly 

 sclerotized and reticulated, with 3-6 (average 4-7) hair-like dorsal head setae. Midcranial ridge 

 dorsally absent ; ventrally narrow but well defined, reaching ocular sclerite posteriorly, 

 surrounding area showing weak polygonal reticulation posteriorly. Genae large, sclerotized, 

 not reticulated, without setae. Eyes : four pairs ; dorsal and ventral pairs large, subequal ; 

 lateral pairs smaller, subequal ; corneae of dorsal eyes 19-23 (average 21) [i in diameter and 

 4-4-5-6 (average 5-0) times as much apart ; those of the ventral eyes 17-23 (average 19) u. in 

 diameter and 1-5-2-2 (average 1 -8) times as much apart. Ocellus small, situated laterally. 

 Ocular sclerite well sclerotized and polygonally reticulated throughout ; dorsally widely separ- 

 ated from median crest. Preocular ridge of variable length, ventral part usually extending about 

 half-way from articular process to midcranial ridge. Postocular ridge very weak dorsally, some- 

 times missing posterior to ocellus ; well developed lateroventrally, but weak posteromedially ; 

 below ocellus the ridge splits up, with the anterior branch partly surrounding ocellus. Inter- 

 ocular ridge absent. Dorsal ocular setae absent ; ventral head setae : 0-4 (average 2-1) h.s., 

 situated on or immediately anterior to margin of the ocular sclerite on each side of midcranial 

 ridge. Preoral ridge present. Tendon-like apodeme long, with a broad base. Cranial apophysis 

 broad, of medium length ; apex truncate with a central lobe, not reaching level of anterior 

 margin of eyes. Mouth opening irregular. Anterior tentorial pits apparently present antero- 

 lateral to mouth opening. 



