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. 



