1734 The Zoologist— July, 1869. 



upon this matter. The development of these creatures is thus ex- 

 cessively slow in comparison with what has been observed with some 

 species of Nematus, the ituagos of which leave the cocoon ten or 

 eleven days after the larva has spun up : it is, therefore, not to be 

 wondered at that the attempt to rear the large Ciiubices so seldom 

 succeeds, as too much damp and too great heat are both equally fatal 

 to the life of the larva. After having been disappointed for years, I 

 was at last fortunate enough to rear a female imago from the cocoon : 

 I had a larva which had spun up on the 10th of October, 1861 : on 

 the 11th of April, 1863, I very carefully opened the cocoon in the 

 hope of finding a pupa contained in it. In this expectation I was not 

 disappointed, as had so often been the case with other larva; — I had 

 the pleasure of finding a pupa, which I took to be three or four days 

 old : it lay in a somewhat curved position, and was of a greenish 

 yellow colour, the head and thorax of a somewhat brownish yellow, 

 and the eyes pale brown (see fig, 13). Having made a drawing of the 

 pupa I replaced it in the cocoon, which I closed as carefully as 

 possible. On the 2nd of May following a female imago was deve- 

 loped, represented at fig. 14. Another female appeared from a cocoon, 

 which I had not opened. 



Both these examples must be classed under that variety (accord- 

 ing to Klug) of Cimbex variabilis which is figured by Panzer as 

 C. montana : they were twenty millimetres long, expanding to forty- 

 three millimetres; the head was of a bronzy brown, with purple 

 tints behind the eyes, and covered with recumbent, silky gray hairs ; 

 eyes and mandibles deep brown, palpi pale yellow, antennae (fig. 15) 

 with the first two joints short and broad, of a brown colour and hairy, 

 the remaining joints pale orange and glalirous ; the third joint elongate, 

 the fourth the length of the two basal joints ; the fifth again shorter, 

 and then a rather thick knob, clearly composed of four joints anchy- 

 losed — thus making nine, the normal number for the antennae of saw- 

 flies. The thorax is entirely bronze coloured, the under side inclining 

 to purple, and covered with fine shining gray hairs. The coxae and 

 the larger half of the feuiora from the base are of the same colour; 

 their lower half and the tibiae are paler; the tarsi are brownish yellow. 

 The spines at the end of the tibiae and the patellulae on the tarsal 

 joints are transparent at the points ; the wings are translucent, of a 

 brownish tinge, and clouded at the extremity ; the nervures are red- 

 dish brown ; the stigma, which is very elongated, is deep brown. In 

 the upper discoidal, tlie first submarginal and the anal cells are 



