PTEROMALIDAE OF N.W. EUROPE g 



Ormocerus aletes (1848 : 163, 9) 

 *Platyterma terminate (1834 : 3°6. 9) 

 *Platyterma comptum (1834 : 34 1 - 9) 

 *Pteromalus aeson (1848 : 174, ^) 

 *Pteromatus amabilis (1836 : 495, 9) 

 *Pteromalus bryce (1842 : 336, $) 

 *Pteromalus felginas (1842 : 336, 9) 



Pteromatus lentulus (1839 : 2 3 2 > (?) 

 *Pteromalus mediocris (1835a : 97, 9) 



Pteromatus pandens (1872a : ioi, (J) 

 *Pteromalus tiburtus (1839 : 251, $) 



Selimnus diores (1842 : 335, 9) 



Trigonoderus hirticornis (1836a : 23, ^) 



Urohpis cychreus (1850 : 131, <$) 



The types of all Thomson and Zetterstedt species are in Universitetets Zoologiska 

 Institutionen, Lund, unless otherwise stated. 



DATES OF PUBLICATION 



The date given on the title-page of Thomson's Skandinaviens Hymenoptera (4e 

 Delen) is 1875. I have cited 1876 as being the correct date of this part, for the 

 following reason. Ashmead (1900, Proc. U.S. natt. Mus. 22 : 325-6) pointed out 

 that Howard had given reliable evidence which showed that this part of Thomson's 

 work appeared later than Mayr's paper on Encyrtidae in Verh. zool.-bot. Ges. Wien 

 25. The latter was read in December 1875 and not published until 1876. 



In determining the dates of publication of some other works (e.g., Westwood, 

 1839) I have made use of internal evidence from sources such as MSS and letters. 



The plates A-P in The Entomologist 1, drawn by Haliday, were published separately 

 with different numbers of the periodical (Walker, in litt. to Haliday) during 1841 

 and 1842. As the precise date of publication for some of them cannot be determined, 

 I have cited 1841-1842 as an inclusive date. 



TERMINOLOGY 



The terms used are nearly all illustrated in Text-figs. 1-6, and are in the main 

 those employed by Richards (1956). A few terms, which either differ from those 

 of Richards or need more explanation, are the following : 



Antenna : unless otherwise stated, the Text-figures illustrate the right antenna 

 viewed from the outside. 



Antenna! clava : this is regarded as having at most 3 segments. In many species 

 a small area (" terminal nipple ", Text-fig. 4) is differentiated at the tip of the clava. 

 and may be quite large in rare cases ; it is not regarded as being a true segment. 



Antennal formula denotes : scape ; pedicellus ; number of anelli ; number of 

 funicular segments ; number of claval segments. Thus the formula of the antenna 

 in Text-fig. 4 is 11263. 



