154 [July, 



the Alps. In Central Europe, many of tliem are very common ; and 

 of these a considerable number are well established with us, while 

 others occur from time to time, but on the whole must be regarded as 

 rarities. 



I will now attempt to diagnose, in a single Synoptic Table for 

 both Grenera, such species as I think have any claim to ran];: as 

 British. Especially in the case of AUantus, I have found, by examina- 

 tion of the actual specimens, that many old records, hitherto accepted 

 as correct, simply rest on mis-identifications ; and others have 

 pretty certainly arisen from the accidental admission of foreign speci- 

 mens, without tickets indicating their origin, into the cabinets of 

 British collectors (especially Leach and Stephens). Afterwards, as in 

 my previous papers, I shall add a few notes on particular species. 



SYNOPTIC TABLE OF BRITISH ALL ANT US AND TENTHREDO, spp 



1. AntenniB short and more or less incrassate before the apex (joints 6, 7, 8 



very miich shorter but evidently broader than joint 3 ! ) Stigma always 

 yellow, at least at its base. Abdomen aZwaj/s more or less banded 

 with yellow {AUantus) 2. 



— Antennae nearly always long and scarcely (or not at all) incrassate before 



the apex (joints 6, 7, 8 almost, or quite, as slender as joint 3!). 

 Stigma often fuscous. Abdomen seldom banded with yellow. . . . 



{Tenthredo) 13. 



2. Head, in both sexes, much dilated behind the eyes (viewed from above, its 



sides converge from back to front ! ). Head, antennae, thorax (except the 

 cenchri), base apex and whole ventral surface of abdomen, and bases of 

 all legs, black. The yellow markings are confined to one or two dorsal 

 abdominal segments, and the middle parts of the legs (tibiae, tarsi, and 

 extreme apices of the front femora) — Very rare, if really British ; I 

 know of no recent captures in these islands A. rossii, Pz. 



— Head not, or scarcely, dilated behind the eyes. Yellow markings much 



more copious than in rossii 3. 



3. Flagellum of antennae fulvous (orange or red brown) 4. 



— At least joints 3 to 9 of antennae black 5. 



4. Large and handsome (wasp-like) species (11-15 mm. long). Tegulae, and 



most of the abdominal segments (at their apices, broadly) bright yellow. 

 — Not uncommon in S. England A. scrophularise, L. 



— Rather smaller and darker (10-12 mm. long), Tegulae black ; yellow bands 



not so regular, and that on segment 5 often wanting. (Hind tarsi 

 rufescent in both sexes) A. omissus, Forst. 



5. Abdomen black at the base, red in the middle, and yellow at the apex.... 



A. flavipes, Fourcr. <J 



