20G IC'HNEUMONID.E, 



more ov less eniarginate next tlie scrobes ; I'jvce subprotuberant 

 and narrower than the frons, a httle constricted towards the 

 mouth; cheeks sliort and not at ah bucoate ; clypeus discrete, 

 convex, apically broadly rounded and usually fiiudy margined 

 though not impressed ; mandibles somewhat narrow and f^radually 

 dilated basally, with the lower tooth usually somewhat the 

 shorter; maxillarv palpi subelongate, with the tbree apical joints 

 sid)e(iual in length. Antenna; short or ol" iionnal length, slender 

 and liliform, though slightly attenuate apically; scape nearly 

 entire apically or a little excised externally at tlie apex ; basal 

 flagellar joint somewhat elongate, cylindrical, and the ai)ical one 

 conical, sometimes double the length of the penultimate. Tliorax 

 gibbulous, longer than high, and narrower than the head; pleurae 

 smooth and nitidulous ; epomia distinct ; mesonotum ovate, with 

 distinct a])ical notauli ; metathorax with the arese complete, 

 obsolete or wanting ; areola sometimes finely delineated, petiolar 

 area verv small and often entire ; spiracles circular and minute. 

 Scutellum subquadrate or subtriangular, apically obtuse and a 

 little convex. Abdomen sessile, or rarely subsessile, as broad as, 

 and twice as long as the thorax, oblong or cylindrical ; epipleuro:^ 

 subobsolete ; basal segment either subquadrate or a little longer 

 than broad, rarely basally subconstricted, more or less distinctly 

 bicarinate and transversely impressed before the apex, with the 

 tubercles near the base ; segments two to four or five transversely 

 impressed and tuberculate, with the elevatioiis nitidulous, and 

 more or less punctate: the sixth and seventh of 5 with the 

 venter longitudinally cleft ; terebra normally or shortly exserted, 

 never longer than the abdomen and rarely longer than its half ; 

 spicula strongly acuminate, with the valvulse elongately pilose. 

 Leo-s normal or slender, with the femora somewhat stout ; apical 

 joint of the hind tarsi usually dilated, longer and broader than 

 the penultimate, with the claws stout, and in $ basally lobate ; 

 the hind tibifo longer than their femora, with short and subequiil 

 calearia. Wings normal or ample ; areolet wanting or obsolete, 

 never entire ; radinl cell sublanceolate ; first recurrent of lower 

 wings either slightly curved and not intercepted, or distinctly 

 bent and emitting a more or less distinct nervellus. 



Bavc/e. Ceylon, Europe, North America, Venezuela. 



The' genus" was originally distinguished from Fhnpla, which it 

 resembles in facies, by the lack of the areolet. Holmgren found, 

 however, that, although it resembled Pimpla in the abdominal 

 conformation, the terebra was as a rule shorter, and the clypeus, 

 besides being more convex, was not, or very rarely deflexed, never 

 impressed, though very often margined before its npex. 



Tlie species of this ge.ius appear to be almost or quite exclu- 

 sively ectoparasites of the Arachnida, and several very interesthig 

 and economically important notices have been published respecting 

 their development. In spite of what Eatzeburg and Howard 

 ('Insect Life,' 188S, p, 42) have said to the contrary, we may, 

 I think, assume, that it is invariably the spiders themselves, 



