252 



TENTHREDINIDJ2. 



in the middle • scutellum reddish, collar (narrowly) and cenchri 

 yellowish. Abdomen black above, with a reddish shine ; the two first 

 segments above, the four first beneath, and all the legs, including the 

 coxae, yellow. Wings dusky hyaline, with fuscous nervures ; costa 

 yellowish, stigma black. 



This insect agrees in shape and neuration with the two preceding 

 species, but the antennas are more slender. 



Hah. Japan. 

 a. $ . (Type.) Hiogo. G. Lewis, Esq. 



5. Siobla ferox. 



(Plate IX. fig. 20.) 

 Macrophya ferox, Smith, Trans. Ent. Soc. Lond. 1874, p. 379. 

 Exp. al. 13 lin., long. corp. 6 lin. 



Black ; antennas, collar, tegulae, scutellum, hinder edge of meta- 

 thorax, first five segments of abdomen (the first broadly edged with 

 black in front, and the second less broadly so), four front legs, the 

 hind tibiae (except the apical third, which is black), and the hind 

 tarsi reddish yellow ; face, cenchri, four anterior coxae, and hind 

 trochanters and tips of coxae paler yellow ; hind coxae and femora 

 otherwise black. Wings yellowish hyaline, clouded towards the 

 extremity ; nervures fuscous ; costa and stigma yellowish, the former 

 darkest before the stigma. 



Described from one male example (not a female, as stated by 

 Smith). 



Hob. Japan. 

 a. S • (Type.) Hakodadi. H. Whitely, Esq. 



6. Siobla incerta. 



(Plate IX. fig. 15.) 



Tenthredo incerta, Cameron, Trans. Ent. Soc. Lond. 1876, p. 465. 



Exp. al. 8 lin., long. corp. 4 lin. 



Head, abdomen, and middle of pectus blue-black, shining, with a 

 reddish shade on the undersurface ; head covered with a fine whitish 

 pile. Thorax and sides of pectus in front red ; the angular spot 

 at the extremity of the first segment of the abdomen, segments 

 3 and 4 above, and part of the legs white ; base of coxae, middle 

 of femora, and extremity of hind tibiae black; all the tarsi more or 

 less black, except the base of the anterior tarsi. Wings hyaline at 

 the base, and clouded at the extremities ; nervures piceous ; costa 

 and stigma more uniformly dark than usual, a dark cloud below the 

 latter. 



The hind coxae are much smaller than in the other species which 



