Fezomachus.] BRITISH ICHNEUMONS. 221 



HELVOLUS. Head darker than thorax ; meso- and meta-thorax of equal 

 length ; petiolar area vertical, its basal costa sharp ; basal segment normally 

 broad apically ; three basal segments fuKous, remainder ])iccous. Length, 

 I J lines. 



SCITULUS. Head variable ; meso- and meta-thorax of equal length ; petiolar 

 area high, broad and vertical, its basal costa weak ; basal segment with dis- 

 tinct but not prominent spiracles ; two basal segments and base of third paler 

 than rest. Length, | line. 



ii. Abdomi?ial puncturation uniform tJtroii^^houi ; tcrcbra shorter. 



UNICOLOR. Two basal flagellar joints, and meso- and meta-thorax, of 

 equal length ; petiolar area oblique, basal costa sharp ;terebra half length of 

 basal segment, spiracles prominent ; antennae unicolorous flavous ; base and 

 apex of abdomen darker. Length, i line. 



VENUSTUS. Basal flagellar joint longer than second ; meso- and meta- 

 thorax of equal length ; petiolar area oblique, its basal costa sharp ; spiracles 

 of first segment not projecting. Colour as in unicolor. Length, \\ lines. 



CONSOBRINUS. Two basal flagellar joints, and meso- and meta-thora.x, of 

 equal length ; petiolar area high and oblique, basal costa weak ; colour as in 

 unicolor, but anus darker, sub-castaneous. Length, i line. 



LiviDUS. Basal flagellar joint longer than second, and meso- than meta- 

 thorax ; petiolar area deplanate and broadly impressed, basal costa strong ; 

 head and anus castaneous, thorax and two basal segments testaceous. Length, 

 I line. 



LANGUIDUS. Like consobrinus, but meta- longer than meso-thorax ; petiolar 

 area sub-vertical, its basal costa strong though sub-obsolete centrally ; pale 

 castaneous with first segment flavous, second rufescent, fourth and fifth darkest. 

 Length, i line. 



CURREXS. Basal flagellar joint longer than second ; meso- and meta- 

 thorax of equal length ; petiolar area only slightly oblicjue, basal costa strong 

 throughout ; head dark castaneous ; thorax and legs fulvous ; basal segment 

 testaceous with distinct spiracles, rest darker. Length, \\ lines. 



This is an extremely abundant species througliout the whole year. 

 Bignell records the typical form from Exniinster and liickleigh in Sep- 

 tember. The form rufuliis is not uncommon at I'elden in Herts, in 

 August (Piflard) ; Botusfleniing in Cornwall (Marshall) ; Finhorough Park 

 in Suffolk (Tuck); common in Norfolk (liridgman); and at Bickleigh in 

 September (Bignell) ; Battle in Sussex (Viet. Hist.) ; several at Oxshott, 

 Harting and Appledore in Kent, in August (Beaumont) ; I have rarely 

 beaten it from pine trees at Foxhall, near Ipswich, in September. Tiie 

 form lulescens has not hitherto been noted in Britain, though very 

 abundant with us ; Piffard has found it commonly at I'elden in Hc-rls. ; 

 Beaumont at Courten and Kilmore in September ; and at Malhon and 

 Harting in August ; Edward Saunders took it at Ilfracombe in October, 

 iScSy ; Marshall at Cornworthy ; 'I'uck at .Southwold and Piungay in 

 Suffolk ; and it has occurred to me conuiionly at Ipswich in July, and on 



