244 BRITISH ICHNEUMONS. [Siilpmis. 



4. blandus, Grav. 



Stilpuus I'latidtis, Gr. I. E. i. 672; Curt. B. E. 388; Ste. 111. M. vii. 210; Fiirst. 

 Verb. Wien. z.-b. Ver. 1876, p. 33, 9; Brisch. Schr. Nat. Ges. Danz. 1881, p. 345; 

 Thorns. O. E. x. 1028, 6 9 . 



Head not buccate behind the eyes, black with the centre of the man- 

 dibles and the palpi red or dull ferrugineous. Antennae somewhat stout, 

 infuscate with the scape red or testaceous beneath, and the three follow- 

 ing joints ferrugineous ; second flagellar joint fully twice longer than 

 broad and longer than the third ; of $ stout and ai)ically incrassate, with 

 the scape entirely black. Thorax immaculate, with the petiolar area 

 impressed and finely rugose transversely. Abdomen black, with segments 

 two and three, except the apex of the latter, rosy red ; basal segment with 

 no tubercles, gradually explanate apically ; terebra very shortly exserted. 

 Legs red ; hind ones with the tarsi, and coxae externally towards the base, 

 nigrescent. Wings hyaline ; stigma infuscate, radix stramineous, tegulae 

 testaceous ; lower angle of the discoidal cell acute and further from the 

 base than the small areolet. Length, 4 mm. 



This species is similar in size and conformation to S. deplanaius ; 

 Brischke says the wings are like those of S. gagafes, and Thomson adds 

 that the structure of the head and the antefurcal nervellus are analogous, 

 but that the metathorax is smoother and more nitidulous, the abdomen 

 longer with the post-petiole not bicarinate, and segments two and three, 

 with the apex of the first, red. 



It is probably not uncommon in woods in September. Curtis says it is 

 rare, but was taken by Haliday in Ireland, and Stephens found it at Hert- 

 ford. Bridgman took it occasionally at Norwich in June and August, and 

 Bignell records it from Bickleigh in Devon, early in the latter month. 

 There are eight females in Capron's collection, and I took another at 

 Brandon in Suffolk on 24th August, 1905. 



5. deplanatus, Grav. 



Stilpnus deplanattis^ Gr. I. E. i. 667 ; Ste. 111. M. vii. 209 ; Forst. Verb. Wien. z.-b. 

 Ver. 1876, p. 34,?. 



Head black, somewhat abruptly rounded behind the eyes ; frons 

 sparsely but not finely punctate, with a few long hairs ; vertex not emargi- 

 nate, face distinctly pilose ; mouth partly red. Antennae rather longer 

 than the head and thorax, very slightly incrassate apically ; basal flagellar 

 joint alone red and as long as the scape and pedicellus. Abdomen 

 ovate-orbiculate, as broad as the thorax, strongly deplanate, sub-glabrous, 

 nitidulous and obsoletely alutaceous ; basal segment gradually very 

 slightly dilated apically, irregularly striolate throughout, with no distinct 

 carinae ; post-petiole somewhat strongly curved and laterally margined, 

 with small tubercles ; the extreme apical angles of the second segment 

 pale ; terebra shortly exserted. Legs not very short ; red, with the coxae 

 and trochanters black, and onychii infuscate. Wings flavescent-hyaline ; 

 stigma piceous, tegulae black, radix pale stramineous. Length, 4 mm. 



Gravenhorst says this species is similar in size and conformation to 

 •S". gagates, but that the terebra is more distinctly exserted ; the antennae, 



