Studie o Coccjdech. ]^9 



in tlie form of scales. It is substanťially distinct by its 5 groups of 

 spinnerets, by a diíferent position and uiimber of cylindrical diicts. 



From the presence of analogous cylindrical and fringed ducts in 

 tlie genns Leucaspis we can judge, that Lencaspis, Parlatoria, Syn- 

 genaspis form a natural group (tribus). 



But geniis Fiorinia does not, however, belong to it, liaving ac- 

 cording to tlie sliape of tlie telson nearer references to tlie genus 

 Diaspis. 



I háve had at my disposition for comparisoii: Parlatoria Próteus 

 Curtis, Fiorinia CameUiae Com. for which botli I ain very indebted 

 to Mr. R. Newstead — Leucaspis pini Hartig, L. pusilla Low, L. 

 Sulci Newstead (=: Fiorinia Stdci Newstead) foimd in Bohemia ; then 

 I háve seen originals of Signoreťs collection, now in Hofmuseum in 

 Vienna. 



Mytilaspis Wewsíeadi n. sp. 



Scale of the male brown, of the samé shape as in the Mytil- 

 aspis pomorum BoucHÉ,(Tab. 1. fig. o.i. Length: 1 mm. 



Scale of the female also brown, but longer and with more pa- 

 rallel sides than in pomorum (Tab. 1. íig. 1., 2.). 



Length : 3 mm. 

 Adult female (Tab. 3. fig. 6., 7.) elongate oval, rounded anteri- 

 oiiy, truncate posteriorly, broadest on the metathorax; hght yellow 

 in colour, telson brown; head, prothorax and mesothorax are melted 

 together, the 1^* — 4'"' abdominal segment and telson are well sepa- 

 rated. Head bears on the dorsum 3 — 6, on the periphery 2 — 3 longer, 

 ventrally 3 — 5 shorter hairs; antennae are obtuse, papiliar, with 2 

 equal hairs, exceeding them 3 times in length. On the space from 

 the periphery to the antennae (frons) open 8 — 14 simple ducts; 

 raentum short conical. 



There are analogous ducts of ceriferous glands as in the genus 

 Syngenaspis : 



small cylindrical ducts (fig. 36.) and 



hroad cylindrical ducts (fig. 3c.) ; their openings form on the 

 abdomen (on 2'"^ — 4*'' joint) besides a peripheric also one parame- 

 dian zone. 



Cylindrical dticts of telson (fig. 3d, fig. 2.) with dorsal, slings- 

 haped thickened orifice (elongated pores Comstock). 



Simple ducts (fig. 3a), which are a iittle inflated below „the 

 crown". 



2* 



