Decade of Neiu Hymenoptera. 17 



apex whitish pubescent ; pygidial area rufescent ; margined 

 distinctly at base and apex ; the latter transverse. The 

 apical ventral segment is also margined laterally, and is for 

 the greater part rufescent. Tibiae and tarsi covered with a 

 silvery pile. The base of the four hind coxae, a line on the 

 femora beneath, the greater part of the four hind tibiae 

 behind, the calcaria and the basal two tarsal joints, more or 

 less black. The tibial spines are few in number and pale 

 in colour ; the metatarsal brush is short and whitish ; the 

 apices of the tarsal joints end in stiff white stout, sharply 

 pointed bristles. The longer spur of the hind tibiae is more 

 than three-fourths of the length of the metatarsus. Femoral 

 spine at the base nearly as broad as the total length ; the 

 apex ending in a blunt tooth. 



Three species oi Piagetia have been described, namely:. 



P. Ritsemcs, Ritzema, Ent. M. Mag. IX., p. 120. Java. 



P. odontostoma. Kohl, Verh.z.-b. Ges., Wien, 1883, p. 31., 

 Arabia. 



P. lVoerde;ii, Kitzema, I.e., p. 121. Congo, South West 

 Africa. 



P. RitsemcE differs from it in the wings having a cloud 

 which extends from the second cubital cellule to the apex ;; 

 theflagellum of the antennae is entirely black, this being also 

 the case with the metathorax, and the base of the abdomen 

 is not fulvous ; there is also a central longitudinal line on the 

 metanotum, which is absent in fasciatiipennis. The form of 

 the clypeus and spine in hind femora is quite different, but 

 as this may be a sexual character (the $ of Ritsenice is 

 unknown) no great reliance can be placed on these points. 

 P. odontostoma differs in the clypeus having four teeth, and 

 no central keel ; the body is almost entirely black, and the 

 wings are clear hyaline. The African Woerdeni has not 

 the clypeus ending in two large teeth, and differs in the 

 colour of the body, &c. 

 B 



