PTEROMALIDAE OF N.W. EUROPE 429 



[NIKOLSKAYANA Boucek 



Nikolskayana Boucek, 1965a : 377. Type-species : N. mirabilis Boudek, by original designa- 

 tion. 



Nikolskayana mirabilis Boucek 



Nikolskayana mirabilis Boucek, 1965a : 378-380, $ $>• 



Central Asia (Turkmenian S.S.R.). 



Biology. Parasite of Carpophoboms perrisi Chap. (Col., Scolytidae) on Pistacia 

 (Boucek, 1965a : 380).] 



CAENOCREPIS Thomson 



Dimachus sgen. Caenocrepis Thomson, 1878 : 50, 51. Type-species : C. arenicola Thomson, 



by monotypy. 

 Xenocrepis Ashmead, 1904 : 276 [nee Forster, 1856]. 

 Xenocrepis Schmiedeknecht, 1909 : 284, 285, 286 [nee Forster]. 

 Xenocrepis Nikol'skaya, 1952 : 223 [nee Forster]. 

 Caenocrepis Thomson ; Boucek, 1958a : 398-401. 

 Caenocrepis Thomson ; Peck et al., 1964 : 44, 45. 



The two European species of this genus were revised by Boucek (1958a). 



Key to European Species 



[The following key is adapted from that of Boucek, 1958a : 400-401.] 

 1 Fore wing beyond the speculum quite densely pilose ; speculum ending about level 

 with the beginning of the marginal vein ; lower surface of costal cell with more 

 than two irregular rows of hairs in the distal half. Gaster of female short-ovate, about 

 as long as head plus thorax ; hind margin of basal tergite only very shallowly 

 emarginate medially ....... arenicola Thomson (p. 429) 



- Fore wing beyond the speculum with sparse pilosity ; speculum extending as a bare 

 strip below the marginal vein as far as the stigmal vein ; lower surface of costal 

 cell with one complete row of hairs, and with at most a few additional hairs in the 

 distal part. Gaster of female sublanceolate, longer than head plus thorax ; hind 

 margin of basal tergite distinctly incised medially bothynoderi Gromakov (p. 430) 



Caenocrepis arenicola Thomson 



Caenocrepis arenicola Thomson, 1878 : 51, $. 



Caenocrepis arenicola Thomson ; Boucek, 1958a : 400-401, figs. 3, 4, (J $. 



Type material. Syntypes, 7 specimens. LECTOTYPE, a female labelled " O " 

 [Oland], " arenicola Ths ", and bearing a label " TYPE ". 



Sweden, France, Austria, Czechoslovakia, Hungary, U.S.S.R. 

 Biology. Unknown. 



