ALLANTUS ARCUATUS. 149 



Mr. Smith tells me that fiavipes is scarce in the 

 London district, but has once or twice been found in 

 plenty. 



On the Continent it appears to be somewhat rare. 

 It inhabits Germany, France, Hungary, Russia. * 



6. ALLANTUS ARCUATUS. 

 PI. IX, fig. 4 a and 6, Trophi; fig. 5, Saw. 



Tenthredo arcuatus, Forster, Cent., i, 79; Lep., Mon., 94,266 



(note), 

 marginella, Pz., F. G., Ixiv, fig. 7; Lep., Mon., 91, 



261 ; Fall., Acta, 1808, 52, 7. 

 flaveola (Gmel.), Lep., Mon., 90, 260. 



notha, King, Berl. Mag., viii, 140, 110; Htg., 

 Blattw., 289, 9; Evers., Bull. 

 Mcsc., xx, 37, 5. 



Allantus arcuaius, Ste., 111., vii, 59, 7 ; Andre, Species, i, 376 ; 



Cat., 50,* 43. 



melanotiis, Rudow, S. E. Z., xxx, 139. 



nothus, Rudow, S. E. Z., xxx, 137, 12 ; Thorns., Opus., 



298, 4 ; Hym. Scan., i, 260, 5 ; 

 Cam., Fauna, 16, 1 ; E. M. M., 

 xvi, 221. 



Black ; Lead and tliorax almost opaque, covered with a close pile and 

 punctured ; basal joint of antennae, labrum, clypeus, tegulae, a line on 

 the pronotum, one or two large marks on pleurae, scutellum, the greater 

 part of the first abdominal segment, a thin line on most of the others, 

 the sides and the greater part of the belly pale yellow. Legs yellow ; coxa) 

 at the base, femora above, apex of the hind tibiae and tarsi black ; the 

 anterior tibiae have a small black line behind, and the tarsi are either 

 yellow entirely or have a black line behind. The ventral segments are 

 marked at the apex with black, but in rare cases the belly is quite 

 yellow. Wings hyaline ; costa and stigma testaceous. 



The 3 has the whole of the legs lined with black behind ; the belly 

 and coxae clear yellow. I have never seen a specimen with the scutellum 

 yellow, and the yellow line on the pronotum is smaller, if not obliterated 

 entirely. 



Length 4f 5i lines. 



A very variable species. The basal joints of the 

 antennse may be entirely yellow; yellow only on the 

 lower surface or quite black; the scutellum is often 

 black. The anterior tibiae and tarsi are generally 

 slightly marked with black behind, but as frequently 

 they are entirely yellow; more rarely the posterior 

 tibiae are lined with black behind; the trochanters 



