1. T. bembeciforme Hlib. t. 20./. 98. —Och. 2. 126.~Curt. B.E. 



pi. 312. *fein. — crabroiiiformis Linn. Trans. 3. tab. 1. 

 f. G-lO.—Haxv.GO. 18. 



Dark brown, with a greyish bloom : antennae blueish black, 

 castaneous beneath in the male : face silvery white ; crown of 

 the head hoary in the female : palpi, anterior margin of tho- 

 rax, and 2 patches behind, deep yellow : abdomen deep yel- 

 low, orange at the apex, the 2 basal segments dark brown, the 

 martrins of the 3 or 4 following of the same colour, the 4th 

 ferruginous at the base : wings pale yellowish, the costa and 

 transverse nervure orange-brown, the interior margin of the 

 same colour, scarlet at the base, with a black spot: nervures 

 and cilia ochreous brown : legs yellow, clouded with orange 

 and scarlet, underside of the thighs brown. 



Whether Hiibner's name has the right of priority I am un- 

 able to say ; but the S. crabroniformis of Wien. Verz., and of 

 Hiibner being synonymous with S. apiforinis, and Fabricius 

 having distinguished another clear winged Sphinx by the 

 former name, it is evident that employing Hiibner's appella- 

 tion for this species will stop further confusion ; and in so doing 

 I am following the example of Ochsenheimer. 



" The larva feeds on the wood of the Sallow {Salix Caprcca), 

 in the heart of which it spins itself up in November, but does 

 not change to a pupa till May following. The fly comes out 

 in the middle of July." Lewin. It has been taken at Darent, 

 Kent, in Norfolk, Suffolk, and near Newcastle. 



2. T. apiforme Linn. F. S. 289. 1093.— Lin?i. Trans. 3. t. 1. 



y. 1-5. — Curt. B. E. Jig. **fcm. — crabroniformis Wien. 

 Verz. — Hub. — Tenebrioniformis Hilb. — Esp. — var. 



Bluish-black: antennas ferruginous beneath in both sexes: 

 face shining whitish : palpi and head deep yellow : thorax 

 dull castaneous on the crown, anterior margin purplish ; a 

 large yellow triangular spot on each shoulder, and yellowish 

 ochre on each side the scutellum : abdomen bright and deep 

 yellow, orange at the apex, 1st and 2nd joints black, except- 

 ing the base of the latter, 3rd, 5th, and 6th margined with 

 black ; 4th annulation black, reddish brown at the base : wings 

 stained yellow, the costa broad, ochreous-brown, transverse 

 nervure and interior margin ochreous-orange, the latter with 

 a black spot at the base : nervures and cilia fuscous : legs 

 orange clouded with ferruginous : thighs brown beneath, the 

 posterior and their coxae bright yellow. 



The larva feeds under the bark of poplar and aspen trees, 



near the bottom ; changes to pupa in April ; the fly appears in 



June, and is sometimes very abundant at Wanstead, Essex, at 



Costessy, Norfolk, &c. 



The Plant is Cerastium viscosum (Narrow-leaved Mouse-ear). 



