Panhais'] BRITISH ICHNEUMONS. 295 



most indefinitely infuscatc, the vertex posteriorly less narrow and the 

 large ocelli not contit>iious with the eyes. 



P. occl/aris, which seems at most but a form of this species, with the 

 ocellar rej^ion black, etc., is recorded by Brid<;nian from Norfolk, and is 

 no rarer with us than the type. 



I consider this species to be certainly Gravenhorst's P. ttslaceus and 

 consequently I have added here the hosts ascribed to the (jravenhorstian 

 species. Not a very common insect with us ; I have it from Hastings 

 (Esam), Guestling (Bloomfield), Shere (Capron) ; bred at Weymouth on 

 30th May, 1900, from Aciotiycia psi (Peachell) ; the New Forest (Miss 

 Chawner), Lyndhurst in August (Adams), and in September at Brocken- 

 hurst (Cross), where I took it at light in May, 1895 ; West Somerset bred 

 on 24th April, and in May (Slater), Ipswich at light on 30th Sept. 

 (Flatten), Brockenhursl at light (Lyle), Doncaster 9th May (Cassal), 

 Macclesfield in 1895 (South) and at Burnley (Clutten). It has occurred 

 to me only singly and usually at light, to which it flew at Southwold on 

 1 8th Sept., 1900, and at 9.30 p.m. on 22nd ; but at Monks Soham it has 

 flown in as late as 1 1 p.m. on 24th July ; my single ex-ccption was on 5th 

 Sept. when I fcnmd a female sucking the stylopods of Angelica syhcs/n's 

 at Foxhall. Peachell has kindlv given me a male, bred in September, 

 igoi, from CuaiUia vcrlnisci, at Princes Risborough in Bucks. Bankes 

 has sent me a female "bred June 20th, 1905, from larva of Cuaillia 

 gnaphalii, Hb., found in Tilgate Forest, Sussex, during 1904"; and 

 another from I\Trs. Holmes at Sevenoaks is " ex pujja of C. giiapJia/ii on 

 ist |ul\-, 1906"; of thirty-one pupae, only six did not produce this para- 

 site ; the larva spins and pupates in the normal manner. The cocoon is 

 smooth and exactly like that of Exc/aslcs cinclipcs (Ichn. pjrit. iii. 203\ ex- 

 cepting a slight central dilation. 



A note in mv MS. diary is thus: — "Dec. 2nd, 1903. Mr. Edward 

 Goodwin sent from INIaidstone a dry larva of CucuUia gnaphalii, Hb., 

 broken in halves centrally, which was quite empty and contain(?d no 

 strands; nothing at all, but a single full-fed Ichneumonid larva, occupy- 

 ing about three-ciuarters of the interior of its dry host when extended ; 

 in the box were two other full-fed and similar parasitic larvae, which 

 (Goodwin says all fed uj)on the single host-larva. They are of llir usual 

 Ichneumonid primrose colour, with only the mandibles (?) and two spots 

 u\)o\\ the extreme anus black, the apices of the eyes and mouth parts in- 

 fuscatc, the spiracles are not dark and the explanate lateral lobe is less 

 consj)icuous than that of any Ichneumonid I have examined, besides 

 being curiously three-fold longitudinally. They differ in two ways from 

 any allied larvae I have seen ; is/, the mandibles are not transverse, but 

 vertical like walrus' tusks (quite black and very long, strongly acuminate 

 and most eflectively used to grij) a fulcrum and draw up the body in pro- 

 gression) ; the head [see fig.], which is very small, apjiears from in front 

 subquadrate, with an oblique line extending quite across it 

 ^^^^_.^^ on either side, and eyes at itsu])])er lateral angles; the body 

 (f(ff~T^ is transversely convex, a little di'planati- ventrally, primrose 

 ill/ i/l "'''' sometimes an orange longitudinal dorsal stripe near 

 ( \Ni|=^^(/ the anus, jnd, the anus is retracted and, even when the 

 ^'^-'^'^ larva is stretched to its fullest extent, is far within the sub- 

 apical segment; in its centre are two lateral black and not 

 quite circular dots, horseshoe-shaped and very conspicuous. Length 

 fully extended, 10 mm. — In the precephalic segment of the dead host are 



U 



