411] LARVAE OF THE TENTHREDINOIDEA—YUASA 93 



without spines, sparsely and microscopically setiferous; head black, shiny, 

 much smaller than thorax; third abdominal segment with six annulets, 

 annulets 2 and 4 each with a transverse row of few stalked glandubae; 

 tenth abdominal segment without spines, truncate on caudal margin; 

 spiracles not winged, but with a pair of faint ventral crescentic brown 

 marks; antennae, (5, 4, 3), 2, 1 in older larvae and 5, (4, 3), 2, 1 in younger 

 larvae; maxillary palpi, 4, 2, 1, 3, pointed; labial palpi rather slender, (1, 2); 

 ultimate stage entirely whitish. 



Tomosthethus bardus Say. — Length, 18 mm.; width of head, 1.9 mm.; 

 body whitish with yellowish tinge, in older specimens yellowish white; 

 head shiny black with clypeus alone lighter in color; legs blackish brown; 

 larvae gregarious; on ash; G-2, Y-8.14. 



Tomostethus multicinctus Rohwer. — According to Sasscer's description 

 (1911) the larvae of this species are indistinguishable from the preceding 

 species but the bred adults have been assigned to this species by Rohwer. 

 Larvae have not been examined. 



Blennocampa Hartig 



Larvae rather small, length 15-20 mm.; greenish; body subcylin- 

 drical, slender, tapering uniformly caudad; spines small, bifurcate, tubercle- 

 like or conical; head very small, third abdominal segment with six an- 

 nulets, annulets 2 and 4 spinose; tenth abdominal segment spinose, spines 

 conical, unbranched, numerous, arranged in four rows, 1: 1: 1-1-1: 

 1-1-1-1-1; typical prothoracic spinal formula: 2-2-1-1-1: 1-1-1: 1: 1-1; 

 third abdominal segment, 2-2-1: 1:2-2-1: 1-1-1: 1-1-1; antennae, 5, (1, 2, 3, 

 4); maxillaray palpi, (2, 3, 4), 1, slender, pointed; labial palpi (1, 2), 

 nearly equal to two distal segments of maxillary palpi taken together; 

 legs with femur longer than tibia; larvapods normal in form, more or 

 less rounded at distal end. 



Blennocampa spiraeae Dyar. — Length, 16.5 mm.; width of head, 1.2 

 mm.; body greenish; head pale brown; legs concolorous with body; ocel- 

 larae entirely black, tips of mandibles and tarsal claws brown; maxillary 

 palpi with segment 4 and labial palpi with segment 2 deep brown; pro- 

 thoracic formula of spines variable, 2-2-1-1-1 or 2-3-1-1, or 2-1-1-1; ab- 

 dominal segment on surpedal lobe with from 2-1 to 2-2 spines; tenth 

 abdominal tergum with small, short, conical spines arranged in four rows 

 as follows: (1) two pair of spines on each side of meson, (2) two spines on 

 each side of the meson, near the center of the tergum, (3) lateral pairs 

 sometimes with additional spines, and (4) the last and caudal row of 

 five spines on each side of meson along the caudal margin of tergum, the 

 three lateral spines closer together than the others; on Spiraea; not bred: 

 M-28. 



