80 TENTHEEDO VELOX. 



being darker in the middle. Vertex, shining, pubescent ; pleurae ancf 

 mesonotum almost opaque. 



The $ has the four middle segments of the abdomen livid testaceous, 

 white in the middle above and beneath, and the anterior legs are of a 

 clearer white in front, while the posterior tibiae are lined with black 

 behind ; there is only one white spot over posterior coxae, and the wings: 

 are a little clouded at the apex. 



Length 6| 7 lines. 



The nearest ally of solitaria is perhaps T. albi- 

 cornis, F. (not a British species), but the latter is 

 readily known from it by having the three apical 

 joints of antennae entirely white, the fourth being 

 black, the clypeus and labrum are black and the 

 mandibles white, the scutellum black, while the tibise 

 and tarsi are testaceous. The $ of albicornis has a 

 distinct appendicular cellule in the posterior wing. 



T. solitaria seems to be confined to the southern 

 counties in England, and is not uncommon in June 

 (on flowers according to Stephens) in the London 

 districts, Kent, Surrey, &c. It has a wide European 

 distribution, being found in Scandinavia, Holland, 

 Germany, France, Switzerland, Italy, and Russia, to 

 the Ural range. 



Antennas short, third joint in part, and the succeeding joints 

 entirely underneath, and the apical altogether white. A single 

 spot over posterior coxae. Pronotum, tegulse, and abdomen 

 black. Legs reddish, black above. Mesonotum and pleurae 

 opaque, finely punctured. Stigma black (Species 6). 



6. TENTHEEDO VELOX. 

 Plate VIII, fig. 6, c?. 



Tenthredo velox, Fab., S. P., 34, 24; Klug, Berl. Mag., viii, 

 185, 123 ; Lep., Mon., Ill, 323 ; Htg., 

 Blattw., 312, 54; Cam., Fauna, 11, 

 3; E. M. M., xvi, 248; Andre, 

 Species, i, 449 ; Cat., 56,* 23. 

 ab. Nigro-lineata, Cam., Sc. Nat., iv, 11. 



Allantus Ste., 111., vii, 68, 32. 



Black ; clypeus, labrum, and base of mandibles, a single spot over 

 posterior coxae, apex of the third, fourth, fifth, and sixth beneath, and 

 seventh, eighth, and ninth (except at extreme apex) entirely white. 

 Legs red, coxae and trochanters and base of femora, apex of posterior 



