145 



DoRN (— ). Siiodrepa panicea als Kofferschadling. "5. panicea as 

 a Pest of Trunks. —£«/. Blatter. Bn-liii. xvii, no. 1-3, 30th 

 March 1921, p. 45.' [Received 17th January 1922.] 



A case is recorded of Siiodrepa panicea infesting a leather trunk 

 and boring in those portions where paste had been largely used. 



Speyer (W.). Beitrag zur Biologie des gefleckten Kohltriebriisslers 



{Ceuthorrhynchus qiiadridens, Panz.). [A Contribution to the 

 Biology of C. qiiadridens.] — Eiit. Blatter, Berlin, xvii, no. 7-9^ 

 28th September 1921, pp. 118-124, 1 fig., 1 plate. [Received 

 17th January 1922.] 



In the course of investigations on the pests of rape crops in the 

 Naumburg district [R.A.E., A. i.\, 547] the author found Ceutho- 

 rrhynchus quadridens, Panz., to be the most injurious of the rape 

 weevils, and the harmfulness of this species is insufficiently recognised 

 in Germany. 



C. quadridens hibernates among fallen leaves in woods and thickets, 

 and it appears about mid-March on Cruciferous plants, including 

 Alliaria, Lepidium, cabbage, rape, radish, and occasionally white 

 mustard. By the end of March it is breeding on the cultivated 

 varieties of these, except on the last named. Eggs, up to six in number, 

 are laid in a puncture in the underside of a leaf-stalk or in the plant- 

 stem, usually just beneath a leaf-stalk. The oviposition period 

 extends up to the end of June. The larvae hatch in five or six days. 

 When mature, the larva bores through the plant-tissue and migrates 

 to the ground, where it pupates. From egg to adult development 

 requires about twelve weeks, the first adults appearing in mid-June, 

 whereas in the case of C. assimilis the life-cycle occupies only six weeks. 

 The adults are not seen in any abundance, so that it is supposed that 

 •they aestivate after feeding for a short period and pass without a break 

 from aestivation to hibernation. In spring the adults attack the 

 leaves and, preferably, the leaf-stalks and plant-stems. The new 

 generation of adults feeds in a similar manner, but the older plants 

 are not affected to the same degree, and as feeding is not prolonged 

 this attack is negligible. Attacks by the larvae are the most harmful 

 and consist in hollowing out the stalks, wdth the result that the plants 

 wither or break in a wind. C. quadridens occurs in various parts of 

 Germany and is probably more widely distributed there than is usually 

 supposed. Its larva is sometimes mistaken for that of Psylliodes 

 chrysocephala or of Bar is sp., but its feeding habits distinguish it from 

 the latter. A Hymenopterous parasite, of which only the larvae 

 have been observed, infests C. quadridens from March to June, but the 

 check effected by it is unimportant. 



Remedial measures have not yet been worked out, but collection 

 is suggested. 



Fehse ( — ) Monochamus galloprovincialis var. pistor, Saperda 

 perforata, Saperda similis. — Ent. Blatter, Berlin, xvii, no. 10-12, 

 26th December 1921, pp. 196-197. 



Monochamus galloprovincialis var pistor is probably the chief 

 representative of its genus in the coniferous forests of North and 

 Central Germany. In Lithuania it was found in stout pine branches. 

 Other species observed in Lithuania are M. sutor, abundant in thin 



