214 BRITISH ICHNEUMONS. {^Pezomachus. 



second and third segments more or less flavidous ; the first with prominent 

 spiracles, basally broad, the petiole slightly explanate, post-petiole broader, 

 with sub-parallel sides and very broad apex. Legs piceous with tro- 

 chanters, base and centre of tibiae, and the tarsi fulvous ; hind legs 

 darker. Length, 2 mm. 



This species was introduced as British by ALirshall in 1870 ; and Bridg- 

 man took a somewhat doubtful female at Norwich (Trans. Norf. Soc. 1893, 

 p. 616). I found a specimen, certainly referable to it, in a rabbit's hole 

 on a sandy heath at Staverton in Suffolk, on 24th June, 1903. The male 

 has not before been associated with this species, nor noticed in Britain ; I 

 secured a specimen, certainly referable to P. fi/sci/li/s, in a rabbit's hole on 

 the same sandy heath at Staverton, on 22 nd June, 1904. 



35. bicolor, Grav. 



rezoinachus bicolor, Gr. I. E. ii. 902, excll. i , varr. et synon. ; Ratz. Iclin. d. Forst. 

 i. 154, (f. iii. 147 ; Fcirst. Wiegm. Arch. 1S50, p. 174, 9 . 



Head shortly pubescent and finely coriaceous. Antennae stout and not 

 elongate ; two basal flagellar joints of equal length, the fifth longer than 

 broad. Thorax short, with sparse but distinct pubescence ; meso- and 

 meta-notum of equal length ; petiolar area vertical, its basal costa strong 

 and laterally obtusely prominent. Scutellum indicated. Abdomen densely 

 punctate and pubescent to the apex ; basal segment somewhat broad with 

 the post-petiole quadrate, its spiracles always more or less projecting ; 

 terebra distinctly shorter than the basal segment. Legs normal. 



Head and antennae deep black ; the latter with the scape infuscate and 

 three basal flagellar joints dull red. Thorax pale red. Abdomen black, 

 with the first segment entirely and the lateral margins of the second 

 broadly red ; remainder with the apical margins of the segments narrowly 

 pale. Legs red, with the apical tarsal joint infuscate. Length, 3^ mm. 



Superficially it much resembles P. circuincmctus and P. cauhcs, but 

 the metathoracic transverse costa is stronger, the petiolar spiracles more 

 prominent and the antennae shorter. Hartig (Jahresb. 1837, p. 253) says 

 the $ is winged, as might be expected from the $ scutellum, but I do 

 not know if it be described. 



I have taken this species, which appears to be very uncommon with us, 

 at Felden in Herts., in August ; and possess others bred by Beaumont 

 from the chrysalis of a species of Depressaria at Appledore in Kent, in 

 October, 1900, and captured by him at Church Stretton, in August. 

 Chitty has found it at Huntingfield and Doddington in Kent. Both sexes 

 are said by Laboulbene to have been bred by Giraud from the galls of 

 Cynips rhizoiiiae, in France. 



36. ochraceus, Forst. 



Pezoinachus ochraceus, Forst. Wiegm. Arch. 1850, p. 159, ?. (7) P. proairsori'iis, 

 Forst. lib. cit. 1851, p. 42, i. 



Flagellum with first joint distinctly longer than second ; fifth longer 

 than wide. Meso- and meta-notum of equal length ; petiolar area almost 

 vertical ; its basal costa distinct throughout, and forming a high, narrow 



