386 Mr. F. Smith's descriptions 



deep pits. Thorax : the posterior margin of the pro- 

 thorax, which is deeply incised, yellow ; the posterior 

 coxfe above, the tips of the femora, the tibite and tarsi 

 yellow ; the wings hyaline, the nervures ferruginous. 

 Abdomen : a triangular spot on the first segment ; a 

 yellow band on the posterior margin of the third segment 

 laterally, and an entire one on the fourth, sixth and 

 seventh segments ; beneath black. 



Hah. — Hakodadi. 



I have given this insect a distinctive specific name, but 

 I believe it to be the same species as Stephens' Cephua 

 quinque-fasciatus ; it only differs in wanting a minute spot 

 or two on the face, in having the first marginal band 

 widely interrupted, and in wanting the two apical ones, a 

 variety I should expect to occur in a series of British 

 specimens. 



2. Cephus afjilis. 



Male. — Length 5\ lines. Shining black ; the face and the 

 abdomen spotted with pale yellow. Head : the face as high 

 as the insertion of the antennge, and the mandibles, yellow, 

 the latter tipped with black. Thorax : the anterior and 

 intermediate femora in front, and their tibiaj, yellow, the 

 latter slightly fuscous behind ; the tarsi fuscous ; the pos- 

 terior tibise yellow at their base ; wings hyaline, the ner- 

 vures fuscous. Abdomen : a triangular patch on the first 

 segment, the third segment with its apical margin laterally, 

 and the fourth with the entire margin narrowly, yellow in 

 the middle, and more widely so laterally. 



Hab. — Hiogo. 



Genus Sirex, Linn. / 



\. Sirex japonicus. 



Female. — Length 9^ — 14 lines. Black, the head yellow ; 

 between the eyes black, and a narrow line from thence 

 to the posterior margin of the vertex ; sometimes the head 

 is entirely yelloAv as well as the antennae and mandibles. 

 Thorax : the prothorax above, the femora, tibiae and tarsi 

 yellow ; the posterior pair more or less fuscous ; wings 

 flavo-hyaline, with a fuscous cloud at their apical margins ; 

 the nervures ferruginous. Abdomen : the first, second 



