415] LARVAE OF THE TENTHREDINOIDEA—YUASA 97 



tenth sternum strongly convex, much shorter than ninth sternum 



Kaliofenusa MacGillivray. 



Caudal end of body truncate, with a mesal suranal protuberance; sternum of ninth abdominal 



segment flattened, uniformly and microscopically spinulate; tenth sternum slightly 



convex, nearly as long as the ninth sternum Fenusa Leach. 



Kaliofenusa MacGillivray 



Larvae very small, greenish white; length less than 12 mm.; thorax 

 broadest on meso thorax; declivous on dorsum from metathorax toward 

 the head; head only slightly depressed, front convex; mouth-parts normal 

 except labium, which is flattened; mandibles rather thick in profile; 

 dorsum and venter covered with brownish, irregular, microscopic dentiform 

 spines, larger on the center of segment and larvapods; caudal end of body 

 rounded; tenth abdominal tergum without mesal protuberance; sternum 

 of ninth segment with a pair of microscopically dentate swellings; tenth 

 sternum strongly convex, much shorter than ninth sternum. 



Kaliofenusa ulmi Sundevall. — Length, 10 mm.; width of head, .9 mm.; 

 head light brown, legs brown, ocularia, mandibles, maxillary palpi, deep 

 brown; sternum of ultimate segment with transverse depression on the 

 caudal third distinct; leaf -miners, on Ulmus, feeding on all tissues except 

 upper and lower epidermis; Y-4-1, -4-2,-8.4. 



Fenusa Leach 



Larvae very small, length less than 12 mm., greenish white; body rather 

 uniform in width except at caudal end which tapers suddenly and dis- 

 tinctly; head strongly depressed; front flattened; mouth-parts protruding 

 beyond the distal end of mandibles; body uniformly and microscopically 

 spinulate; no distinct localized microscopic dentiform spines; caudal 

 end of body truncate; tenth abdominal tergum with a distinct mesal coni- 

 cal suranal protuberance; sternum of ninth segment rather flattened, 

 without microscopically dentate swellings; tenth sternum slightly convex, 

 nearly as long as ninth. 



Fenusa dohrni Tischbein. — Length, 10-11 mm., width of head, 1.1 mm.; 

 head brown; prothorax with dorsal and ventral shields indicated; thoracic 

 legs light brown, trochanter wanting, femur subequal in length to tibia; 

 tibia with proximal end subequal in diameter to distal end of femur; 

 tenth abdominal sternum with transverse depression in caudal fourth 

 indistinct; body often greenish, green adipose tissues being visible thru 

 the cuticle; dorsal vessel showing thru as light-colored line; leaf -miners on 

 Alnus vulgaris, feeding habit similar to that of Kaliofenusa ulmi; Y-4. A, 

 -43-1-2. 



