41. 

 CIMBEX DECEM-MACULATA. 



Order Hymenoptera. Fam. Tenthredinidae Lat., Leach. 



Type of the Genus Tenthredo europsea Leach. 



CiMBEX OUv., Fab., Lat., Leach. Tenthredo Linn., Jitr. 



Antennce inserted between the eyes, clavate, 6-jointed, first joint 

 cup-shaped, second very short, third very long, fourth and fifth 

 clavate-truncate, sixth oblong, club-shaped, witli a transverse 

 suture. (1.) 



Lahrum small, oblong, rounded at the apex, hairy. (2.) 

 Mandibles exserted, unequal, robust, acute, with one or two 

 irregular teeth on the inside. (3.) 



Maxillce membranaceous at the apex, with a large hairy lobe 

 near the base of the palpi, extending towards the apex. 

 Palpi irregular, extending a little beyond the maxillae, G-jointcd, 

 third joint the longest, fourth somewhat clavate, sixth small, 

 ovate. (4.) 



Mentum oblong, dilated anteriorly (5. a.) : Palpi scarcely longer 

 than the lip, 4-jointed, gradually increasing in size to the third 

 joint, terminal joint small (b.) : Lip membranaceous, with a few 

 hairs above, three-lobed, the centre one narrow, external lobes 

 somewhat hemispherical, (c.) 

 Clypeus broad, emarginate. Ocelli 3. Abdomen sessile, cylindric i;i 

 the males, somewhat ovate in the females, first segment especially of 

 the males deeply emarginate above. Oviduct not exserted, composed 

 of two lamellcE, which are serrated. Superior wings with 2 marginal 

 and 3 submarginal cells. Thighs 4 posterior unarmed, very thick in 

 the males. Tibiae terminated by syphonformed spurs, obtuse at the 

 apex. Tarsi with the penultimate joint a little shorter than the an- 

 tepenultimate, four first joints with membranaceous appendages 

 (8. a fore leg) ; the basal joint of the 4 posterior tarsi of the males 

 produced into a spine beneath. (8. a.) 

 Larva tvith membranaceous feet. 



Dkckm-maculata Leach Zool. Mis. v. 3. p. 106. n. 7. T. lutca Linn. ? 

 Fn. Sn. 1534. 



Body obscurely villose : black, the abdomen tinged with violet, 

 the lliird and seventh joints having a pale greenish yellow s])ot on 

 eadi side ; the 3 intermediate joints of the same colom- intorrujjtcd 

 by bhickish violet down the centre. Abdominal membrane pale 

 yellow. Antennae and tarsi testaceous. Wings pale fulvous : 

 costa, 2 cells near the stigma and posterior margin ferruginous. 



In the Cabinet of the British Museum. 



1)k. LE.\(n lias described in the Zoological Miscellany (above 

 referred to) eleven species of this fiiie Genus, seven of wliicli 



