564 TINEIlSrA [trochilium 



second joint thickened with rough scales beneath, terminal 

 loosely scaled. Abdomen with large flattened expansible anal 

 tuft. Forewings : 7 to apex. Hindwings : 3 and 4 stalked. 



A considerable genus, but mainly confined to tlie European 

 region, with a few species in other parts of the Northern hemi- 

 sphere, and two or three stragglers further south. The species 

 are on the whole so difficult of observation tliat they are prob- 

 ably much overlooked ; the imagos require a knowledge of their 

 special habits, and are even then hard to see, sometimes almost 

 invisible on the wing ; and those larvae wliich feed in solid 

 wood are troublesome to obtain. 



1. Face wholly black . . . .2 



,, white at least on sides . . .3 



2. Antennae with white subapical baud . 2. spheciforme. 



,, without white band . 3. amlreniforme. 



3. Forewings with subdorsal hyaline area reaching trans- 



verse vein . 4. 

 „ „ „ ,, absent or not reaching 



transverse vein 9. 



4. Transverse bar posteriorly orange . 5. asilifornie. 



,, ,, not orange . . .5. 



5. Terminal fascia red . . 8. farmiciforme. 



,, ,, not red . . . .6. 



6. Terminal fascia suffused with yellow . 4. tipuiiforme. 



„ „ not suffused with yellow . . 7. 



7. Abdomen with two yellow rings . .1. scoliiforvw. 



,, ,, one red (seldom white) band . 8. 



8. Palpi beneath reddish-orange . .7. culiciforme. 



,, ,, not orange . . 6. myopiforme. 



9. Forewings marked with orange-red . . 10. 



,, without red scales . 10. musciforme. 



10. x\ual tuft reddish-orange . 11. chrysidiforme. 



„ „ not orange . . 9. ichneiunoniforrne. 



1. T. scoliiforme, Bkh. 25-34 mm. Head with white vertical 

 oar before each eye and yellow ring at back. Antennae broadly 

 ochreous-white towards apex. Abdomen with yellow rings on 

 2 and 4 ; anal tuft orange. Forewings hyaline ; costal and 

 dorsal streaks black sprinkled with yellow ; veins, a broad 

 bar on transverse vein projecting angularly towards base, and 

 broad terminal fascia narrowed to tornus violet-black. Hind- 

 wings hyaline ; veins, a triangular bar on transverse vein, and 

 termen black. 



Denbigh, Perth and Argyll to Sutherland, local and un- 



