208 POSOILOSOMA LUTEOLUM. 



13 (14) Claws almost bifid, antennae longish, in $ longer than the body. 



Longicorne. 



14 (13) Claws with a subapical tooth. Antennae short ; in $ not much 



longer than abdomen. Submuticum. 



15 (12) Tibiae and tarsi broadly white, costa and stigma dull testaceous ; 



clypeus deeply incised. Excisum. 



16 (9) Pronotum entirely black, antennae short, thick. Nigricolle. 



1. PCECILOSOMA LUTEOLUM. 



PL IV, fig. 12, Larva, 



Tenthredo luteola, Klug, Berl. Mag., viii, 9; Htg., Blattw., 28], 



52 (Eriocampa). 



Menostegia luteola, Costa, F. N., 1861. 

 Selandria luteola, Kalt., Pfl., 423, 426. 

 Pcecilosoma luteola, Thorns., Op., 288, 2; Hym. Sc., i, 228. 

 Eriocampa luteola, Andre, Species, i, 319 ; Cat., 10,* 2. 



Antennae shorter than the head and thorax, thickish, a little dilated 

 at the apex ; first joint a fourth longer and thicker than the second ; 

 third a quarter longer than the fourth ; remaining joints becoming 

 gradually shorter ; black, pale luteous beneath, and covered with a 

 short pile. Head black, half shining, densely covered with a short 

 pile ; frontal sutures invisible ; apex of clypeus and labrum luteous. 

 Thorax black, pilose; breast and pleurae very smooth and shining, 

 slightly pilose. Tegulae and pronotum luteous ; cenchri large, pale 

 white. Sutures of mesonotum moderately deep. Abdomen luteous, a 

 very little narrower than the thorax, of nearly uniform breadth, blunt 

 at the apex; blotch large, pale white; sheath black, projecting. Legs 

 luteous, the apices of the tarsi fuscous. Wings longish, with a smoky 

 tinge, yellowish at the base, more hyaline at the apex ; costa luteous 

 at the base, the apex with the stigma fuscous ; nervures yellowish at 

 the base, blackish at the apex ; the first radial cellule smaller than the 

 second, tr. radial nervure curved, received a little beyond the middle of 

 the third cubital cellule ; first cubital cellule a little shorter than the 

 second, a half wider at the base than at the apex ; second narrow, of 

 nearly equal width throughout, except where the recurrent nervure is 

 received ; third a fourth longer, more than double the width of its base 

 at the apex ; fourth a little longer than the first two ; the second 

 recurrent nervure is curved, and is received a little in front of the 

 middle of the cellule. 



Length 3^ lines. 



The c? is unknown to me, and appears to be very 

 rare. 



Lutecium differs from all the other species of Pcecilo- 

 soma in the colour of the abdomen. It resembles very 

 much the yellow species of Seiandria in many respects, 

 but is best, I think (unless it be placed in a genus by 



