PTEROMALIDAE OF N.W. EUROPE 459 



Micromelus Walker ; Forster, 1856 : 53, 57. 



Baeotomus Forster, 1856 : 145 [n. n. for Micromelus, supposedly pre-occupied in botany]. 



Merisus subg. Baeotomus Forster ; Thomson, 1878 : 60. 



Micromelus Walker ; Ashmead, 1904 : 323, 324. 



Micromelus Walker ; Schmiedeknecht, 1909 : 362-363. 



Micromelus Walker ; Kurdjumov, 1913 : 3. 



Callitula Spinola 

 Callitula Spinola 

 Callitula Spinola 

 Callitula Spinola 

 Callitula Spinola 

 Callitula Spinola 



Hill & Smith, 1928 : 153-155. 

 Gahan, 1933 : 109-114. 

 Nikol'skaya, 1952 : 217. 

 Peck, 1963 : 652-653. 

 Boucek, 1964 : 9-15. 

 Peck et al., 1964 : 30, 47. 



The name Callitula Spinola was adopted for this genus by Gahan (1933) and has 

 been generally accepted since. Gahan, who gave (1933 : 111-113) a detailed 

 historical account of the generic nomenclature, pointed out that Spinola's 

 description was quite inadequate for recognition of the type-species {bicolor Spin.) 

 but gave plausible reasons for his adoption of the name in spite of this. 



Key to European Species 

 (Females) 



1 Antennal scape somewhat longer than an eye, reaching well above the level of 



the vertex. Gaster sublanceolate, slightly longer than head plus thorax, 2-3 

 to 2 -4 times as long as broad . Anterior margin of clypeus deeply emarginate, 

 appearing bidentate in some aspects. Large species, length 2 to 3-2 mm. 

 Wings fully developed ..... elongata (Thomson) (p. 460) 



- Antennal scape at most as long as an eye, reaching at most slightly above level 



of vertex. Gaster short- to long-ovate, at least somewhat shorter than 

 head plus thorax. Anterior margin of clypeus less deeply emarginate, 

 sometimes almost truncate. Species on the average smaller, up to 2-2 mm. 2 



2 ( 1 ) Antennal scape as long or virtually as long as an eye, reaching slightly above the 



level of the vertex. Gaster usually at least slightly sunken dorsally, even 

 tergites one and two ; tergite two at most half as long as one, and usually 

 only slightly longer than three. Anterior margin of clypeus distinctly 

 emarginate, but less deeply than in elongata. Wings fully developed 



ferrierei Boucek (p. 460) 



- Antennal scape slightly shorter than an eye. Gaster weakly to strongly con- 



vex dorsally ; tergite two, two thirds to three quarters as long as one, and 

 much longer than tergite three. Anterior margin of clypeus very shallowly 

 emarginate, almost truncate ........ 3 



3 (2) Wings fully developed. Head in dorsal view approximately twice as broad as 



long. Gaster, dorsally, usually immaculate or with a reddish spot in its 

 basal half, rarely more extensively reddish . . bicolor Spinola (p. 460) 



- Wings rudimentary, tips of fore wings reaching at most hardly beyond apex of 



propodeal nucha. Head in dorsal view only i-8 to 1-85 times as broad as 

 long. Gaster, dorsally, usually with its basal half or more red 



pyrrhogaster (Walker) (p. 462) 



(Males) 

 1 Anterior margin of clypeus deeply emarginate, appearing bidentate in some 



lights. Fore tibiae at most weakly infuscate at apex ; fore tarsi at most 



