108 NEMATUS PALLIDIVENTRTS. 



Nassau, while Thomson had only a single specimen 

 from near Stockholm. 



XII. THE GROUP or LEUCOG ASTER. 



Body black, edge ofpronotum, tegulw, and belly white 

 or lacteous. Wings with a pale costa, the stigma lirid, 

 fuscous, or white. Antennae longish, black, third and 

 fourth joints mb equal. Front punctured, clijpeus almost 

 truncated or incised. Body smooth, shining. Legs 

 whitish, the femora marked sometimes with blade. 

 Claws usually with a subapical tooth. The first trans- 

 verse cubital nervure is absent or pellucid. 



A group of small extent. The totally black meso- 

 notum distinguishes it from Group XIII and from the 

 preceding. 



Synopsis of Species. 



1 (6) Femora more or less black, clypeus almost truncate at apex. 



2 (3) Hind femora broadly black. " Conductus. 



3 (2) Hind femora black at apex only. 



4 (5) Vertex raised, belly and sides of abdomen lacteous. Obductus. 



5 (4) Vertex flat, belly and sides of abdomen yellowish. 



Pallidivcntris. 



6 (1) Femora without black, clypeus more or less incised at apex. 



7 (10) Metapleimi black, stigma livid. 



8 (9) Clypeus black, costa paler than stigma. Leucogaster. 



9 (8) Clypeus white, costa not paler than stigma. Strongylogaster. 

 10 (7) Metapleura white, stigma white. Pulchellus. 



40. NEMATUS PALLIDIVENTUIS. 

 PI. II, fig. 1, ? ; PL XXII, fig. 4, Saw. 



Tenthredo pallidiventris, Fallen, Acta, 1808, 120, 63. 



Nematus Thorns., Opus., 110, 35 ; Hym. Sc., i, 



i, 110; Andre, Species, i, 191; Cat., 

 21,* 151 ; Cam., Fauna, 29, 2. 



~ flavicomus, Tischbein, S. E. Z., 1846, 77; Andre, 

 1. c., 199 ; Cat,, 23,* 168 ; Br. and 

 Zad., Schr. Ges. Konig., xx. 154, 

 136, pi. vii, fig. 7. 



