218 I5KITISH ICHNEUMONS. [^IJoJocrcmna. 



H. vexata is also omitted, since no one has mentioned it here and 1 know 

 nothing of Marshall's authority for placing it in his catalogues; Thomson 

 says it differs from the whole remainder of the genus in having the head 

 not posteriorly dilated, and the hind femora black. 



Table of Species. 



(2). I. Vertex explanate behind the e^'cs ; 



hind femora black i. inckassatok, Ho/iugr. 



(i). 2. Vertex not posteriorly dilated; liind 



femora always red. 

 (-1). 3. Mandibles basally reflexed below ; 



speculum dull . . . . . . 2. CLANDRSTINA, Ilolnigr. 



(3). 4. Mandibles not basally reflexed; 



speculum nitidulous. 

 (6). 3. Ventral plica infuscate ; mandibles 



short and stout ■ 3- ERVTHROPYGA, i^^;/w_^r. 



(5). 6. Ventral plica stramineous ; mandibles 



not stout. 

 (S). -. Head posteriorly constricted; hind 



tibiae subimmaculate . . ■ ■ 4- ARGENTATA, G?-av. 



(7). S. Head hardly constricted ; hind tibiae 



infuscate-marked . . . . • • 5. PUBESCENS, Rafz. 



1. incrassator, Holiugr. 



Campoplcx transicns, Ratz. Ichn. d. Forst. ii. 84 (?). C. incrassator, Holmgr. 

 Sv. Ak. Handl. 1854, p. IS, <f 9 . Limneria incrassata, Holmgr. lib. cit. 1858, 

 p. 89; Bridg. -Fitch, Entora. 1885, p. 207, 3 ? . Holocrciuna incrassata, Thorns. 



E. xi. 1177, cj ? . 



Black with the abdomen apically, or also centrally, castaneous; anterior 

 femora nearly entirely and their tibiae red, hind tarsi short and ferrugin- 

 eous, their coxae and trochanters and femora black or the last piceous, 

 and their tibiae usually apically and before the base nigrescent ; wings 

 hyaline with areolet broadly sessile ; mesopleurae nitidulous and not very 

 coarsely punctate ; antennae not longer than half the body and apically 

 but little attenuate. Length, 7 mm. 



This is one of the largest of the genus and differs from all its other 

 species in having the head distinctly a little explanate posteriorly ; the 

 structure of the flagellum and hind pedal colouration are also distinctive. 



1 have not seen" the male but in my females the very stout abdomen is no 

 more than dull badious from centre of third segment with anus indefinite- 

 ly darker, and the hind tibiae no paler but dark castaneous with extreme 

 base and apex merging into black. It is a striking insect, somewhat 

 resembling a modified form of Phacogaus crpha/o/cs. 



Holmgren gives four or five Swedish localities, though no situations ; 

 and Thomson simply refers to it as rare in north and central f^urope. 

 Ratzeburg's insect, thought probably synonymous by the latter, was raised 

 in German)' from Sliviigylogasler chigu/a/iis, and is recorded from France. 

 It was introduced as British by Marshall (Entom. 1872, p. 432) on the 

 strength of Francis Walker's Isle of Man capture ; but the record (Proc. 

 S. Lond. Ent. Soc. 1896, p. 85) of both sexes having been bred from 

 larvae oi Eupethecia expallidata must be an error; it is certainly very rare 

 with us and I find no further mention of it ; I possess but three speci- 

 mens, taken by Piffard at Felden in Hertfordshire and by myself at Holi- 

 day Hill in the New Forest on i8th June, 1907, and at \'entnor in the 

 Isle of Wight on 29th of the same month. 



