16 CIMBEX HUMEJiALlS. 



I have one British specimen which agrees pretty closely 

 with it, but the ground colour is darker. 



The form from Salix alba has been shown by 

 Brischke (Schr. Natur. Ges., Danzig, vii) to be par- 

 thenogenetic, but he did not rear the larvae. 



Not common. Perthshire, South of England. 



Continental distribution : Sweden, Germany, Hol- 

 land, France, Italy. 



4. CIMBEX HUMERALIS. 



Crabro humeralis, Fourc., E. P., ii, 361. 

 Tenthredo connata, de Vill., Linn. Ent., iii, 84, 13. 



axillaris, Jur., Hym., 48, pi. 6, f. 1. 



Cimbex axillaris, Pz., F. G., Heft 81, pi. vi; King, Beri. Mag., 

 i, 84 ; Htg., Blattw., 68, 2 ; Spin., Ins. 

 Lig., ii, 152, 5 ; Yoll., Tijd. Ent., v, 49, 

 pi. i, Zool., s.s. 9263. 



humeralis, Lep., Mon., 30, 81 ; Ste., 111., vii, 8, 8 ; Andre, 



Species, i, 24; Cat. 1*, 1. 



scapularis, Stein, S. E. Z., xxxvii, 53 (1876). 



Black; antennae yellowish, the club more or less fuscous; clypeus 

 and pronotuiii clear yellow; the mandibles, labrum, sides and vertex 

 of head, pleurae, scutellurn, and legs, yellowish- testaceous; abdomen 

 clear yellow; the basal two segments, the third in the middle, the 

 fourth, except at the sides, the edges of the following segments, and a 

 small triangular mark in the centre, black. Head and thorax covered 

 with a pale fuscous, longish pubescence ; mesonotum, pleurae, and base 

 of abdomen punctured. Wings yellowish, the fore half fuscous, ner- 

 vures testaceous ; the second recurrent nervure not interstitial. 



Length 78 lines. 



As with the other species, humeralis exhibits a cer- 

 tain amount of variation in coloration, but it is very 

 small in comparison with that shown by sylvarum and 

 lute a. 



The larva of this species feeds on hawthorn and on 

 Prunus padus. The body is bluish- white, somewhat 

 yellowish at the sides. On the back is a broad, bluish 

 central stripe, divided as usual into clear and darker 

 spaces alternately. On either side of this stripe is a 

 line of small, transverse, black and orange spots. On 

 each segment are: a little wedge-shaped black line, 

 close against it an orange spot, broadest above, after 



