52 BRITISH ICHNEUMONS. [Microcryfins. 



The female has once or twice occurred to me in early June, at Belstead, 

 near Ipswich, running swiftly, with waving antennae, over the leaves of 

 Arctium mi/nts, especially at sundown. 



27. labralis, Grav. 



Pliygadeuon lahralis, Gr. I. E. ii. 710; Tasch. Zeits. Ges. Nat. 1865, p. 46, S ; cf. 

 Brisch. Schr. Nat. CSes. Danz. 1S79, p. 342. Aptesis vestigialis, Fiirst. Wiegm. Arch. 

 1 850, p. 90. Miirocryptus vestigialis, Schm. Opusc. Ichn. ix. 653, ? . 



$. Head, with labrum, the distinctly discreted clypeus and often the 

 palpi, white. Antennae half as long again as the body, with the scape 

 sometimes flavescent beneath. Thorax and scutellum black ; metathorax 

 finely alutaceous with sub-complete areae ; areola laterally straight and 

 not separated from the basal area ; spiracles circular. Abdomen oblong- 

 clavate and narrower than the thorax ; black, with segments two to four, 

 and an apical mark on the first, red ; basal segment slender, with weak 

 carinae and normal tubercles ; post-petiole gradually explanate, foveate 

 and a little broader than the petiole. Legs slender red ; coxae, trochanters, 

 and sometimes the intermediate femora basally, black ; hind legs with 

 the tarsi, apices of the tibiae, and the femora above or entirely, black. 

 Wings somewhat ample, hyaline ; radix flavescent and tegulae infuscate. 

 Length, 7-9 mm. 



The similarity of this male to Phygadeuon jejitjiator, var. i, Grav., 

 leads one to expect that it is the male of some Aptesis, but no analogy has 

 until now been suggested. Schmiedeknecht places it as an insufficiently 

 described species of Phygadeuo7i., but the white clypeus and scape, together 

 with its relationship with AI. micropterus, certainly indicate its position 

 in the present genus. Front the last-named species it differs in its pale 

 clypeus, immaculate orbits, sub-complete metathoracic costae, infuscate 

 tegulae and black front trochanters. 



? . Head black, the palpi red-yellow, the mandibles red with black 

 apex ; the whole face with the clypeus and the cheeks also red, only above 

 and round the clypeus slightly brownish ; the inner orbits to above the 

 antennae usually red. The whole face rugose, also the temples, the latter 

 however somewhat more finely ; but the clypeus, the cheeks and the 

 vertex, with the occiput, smooth. Antennae with joints one to eleven red- 

 yellow, eight to eleven sometimes paler, the rest brownish. The thorax 

 red-yellow, the mesothorax, like the head, rather distinctly but somewhat 

 diffusely punctate ; the petiolar area of the rugose metathorax surrounded 

 by a ridge distinct throughout and more prominent laterally ; inside this 

 ridge are two costae which converge downwards whereby an area postero- 

 media is produced. At the base all trace of costae is wanting, and at the 

 sides the costulae of the areola spiraculifera are very indistinct. The wings 

 extend a little beyond the apex of the metathorax, tegulae red-yellow ; 

 nervures yellow, at most feebly red-yellow, apical cells incomplete. Ab- 

 domen finely and somewhat diffusely punctured, smooth, pubescence 

 comparatively long ; segments one to three red-yellow, the following 

 brown ; terebra with feebly brownish sheaths, rather longer than the first 

 segment, which is without prominent tubercles, gradually but not strongly 



