MANDinULATA. HVMENOPTEEA. 



Genus L— CIMBEX, Olivier. 



AntenncE clavate-capitate, 7-jointed, basal joint robust, 2nd minute, 3rd very 

 long and slender, 4th and 5th clavate-truncate, equal in length, 6th and 7th 

 coalescing, and forming an oblong ovate chib: head as broad as the thorax : 

 ocelli 3 : mandibles irregularly 3-dentate : body robust, obscurely villose : 

 wings ample, anterior with 2 marginal and 3 submarginal areolets, the 1st 

 of the latter receiving 2 recurrent nervures: abdomen cylindric in the males, 

 with the 1st segment deeply notched above, and having a membrane in the 

 emargination ; ovate in the females : 4 posterior Jemora unarmed, thickened 

 in the males ; iibice with 2 obtuse spurs at the apex. 

 Cimbex differs from the cognate genera, not only in the structure 

 of its antennae, but from having the labrum comparatively smaller, 

 the body less pilose, furnished with a large membrane at the base in 

 the males, and in which sex the 4 hinder femora are very much 

 incrassated and curved; the anterior tarsi with spiny processes 

 beneath, &c. The larvs2 form a strong oval cocoon, in which they 

 change to pupa ; they appear very difficult to rear, as I have expe- 

 rienced, having taken many ; but when found in the pupa state, they 

 have frequently produced the imago : in general, the species are very 

 rare. 



Sp. 1. femorata. Violascente-nigra, subpubescentia, antennis luteis basifuscis, 

 tarsis memhranaque abdominali luteis, femoribus tibiisque cyaneo-atris, alts 

 hyalinis apice areolaque costali 2dd antice Juscescentibus. (Long. corp. 11 — 

 13§ lin.; Exp. Alar. 20— 25 lin.) 



Ten. femorata. Linnc. — Ci. femorata. Steph. Catal. 323. No. 3734. 



Slightly pubescent ; violet-black, the head and thorax of a deeper and less 

 violet tint; antennss luteous, with the base fuscous or black; abdomen 

 with its basal membrane luteous ; femora and tibiae of a blue-black ; tarsi 

 luteous or testaceous ; wdngs hyaline, with the apex and second costal 

 areolet anteriorly fuscescent. 



The male in this (as in the other species of the genus) has the abdomen less 

 robust, with the two posterior femora elongated and thickened. 



One of my specimens has the three intermediate joints of the abdomin above 

 dull ferruginous, and another the apex pitchy. 

 Extremely rare in England: it occurs near Windsor, and in 



Darenth wood, towards the end of June. 



Sp. 2. varians. Nigra, antennis tarsis membranaque abdominali luteis, nlis 

 hyalinis, apice areolaque submarginali secundd fuscis. (Long. corp. 7 — IH 

 lin.; Exp. Alar. 15 — 20 lin.) 



Ci. varicms. Leach.— Steph. Catal.32i. No. 3735. 



