382 Mr. F. Smith's descriptions 



2. Tenthredo providens. 



Female. — Length 7 lines. Black, the three basal joints 

 of the antennae, the scuteUum, and base of the abdomen, 

 pale yellow. Head : the clypeus, labrum, mandibles and 

 palpi yellowish-white ; the cheeks at the base of the man- 

 dibles testaceous ; the tips of the mandibles black. Thorax : 

 the margin of the prothorax in front of the tegulte pale 

 testaceous ; the scutellum and legs yellow ; the posterior 

 tibiae black towards their apex ; a white spot above the 

 posterior coxte ; all the cox^ black, with their apex yellow ; 

 wings hyaline and iridescent, the apex of the anterior pair 

 dark brown at their apex beyond the stigma ; the nervures 

 black, except the costal one and the stigma, which are 

 testaceous. Abdomen black, with the three basal seg- 

 ments pale yellow. 



Hab. — North Japan. 



3. Tenthredo scalaris, Klug. 



With the exception of this insect being considerably- 

 larger than the European species, I am unable to point 

 out any difference ; only a single example has been re- 

 ceived. The cabinet specimens are pale yellow, when 

 living they are green ; the antenna? black, with the scape 

 yellow in front; a transverse ovate black spot on the 

 vei'tex, enclosing the ocelli, with a line on each side of the 

 anterior ocellus. The mesothorax black above, with two 

 oblique yellow lines on each side, in the middle ; the 

 scutellum yellow. Abdomen : a longitudinal broad black 

 stripe extending from the base to apex ; in European ex- 

 amples, the apical margins of the segments are sometimes 

 narrowly yellow ; a narrow black line on the femora and 

 tibiae, and the tips of the joints of the tarsi, black. 



Length of Japanese specimens 6^ lines ; of European 

 ones 4^ to 5 lines. 



Hab. — Hakodadi. 



4. Tenthredo hilaris. 

 Female. — -Length 7 lines. Black, Avith the extreme 

 lateral margins of the abdomen yellowish-white ; the an- 

 terior and intermediate legs pale ferruginous, with the 

 posterior tibi» and tarsi black. Head : the clypeus, labrum 

 and mandibles pale yellow, the tips of the*^ latter black. 



