458 HALIDAY ON his secret is not in my keeping; all the attempts hitherto made to unmask him have been futile : — Vale, Vale ! Yours most truly, Epping, Nov. 5, 1834. A. Art. XLII. — Essay on Parasitic Hymenoptera. By A. H. Haliday. {Continued from page 259.) Of the Ichneumones Adsciti. Gen. VI. Leiophron. Palpi maxillares 5-articulati : oculi glabri s. subglabri : alarum anticarum areolce cubitales duce ; posticarum areola brachialis posterior apice recta clausa : aculeus deflexus aut reconditus. Os breve : mandibulje apice bidentes, cuneatae curvatae, sub clypeo forcipatae, cum labro os antice claudentes : labrum transversum : epipharyngis ligula apicalis attenuata prostans ; maxillas lobus membranaceus obtusus : palpi maxillares 5-articulati : articulus l mus . non perbrevis, 2 dus . reliquis crassior, 3 tius . plerunque longior : ; labii lobus integer obtusus : palpi labiales plerunque 3-articulati, rarius articulo penultimo minutissimo aucti : antennarum articu-lorum numerus varius : facies supra clypeum bifoveolata : oculi glabri vel pilis raris erectis consiti, quarum discrimini speculo sub-tiliore opus est : ocelli in triangulum : occiput marginatum parum concavum : thorax oblongo-ovatus convexus : abdominis seg-menta 2 dum . et 3 tium . vix manifesto discreta : 6 tum . ventrale haud insigniter productum : aculeus deflexus aut reconditus : pedes mediocres ; calcaria parva : alse diaphana? ; anticarum stigma dis-tinctum, areola disci-antica a cubitali discreta, cubitales duae nus-quam coarctatae, rarius una efFusee : — posticarum areola radialis remota (i. e. a brachiali), brachialis posterior anteriore parum bre-vior, nervo trans verso apicis recto. Colores saepius nigri nitidi, rarius flavescentes : magnitudo variat : de vita et moribus nihil fere constat : larva speciei cujusdam in larva boletophag& Insecti Coleopteri vixerat.
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