421] LARVAE OF THE TENTHREDINOIDEA—YUASA 103 



Subfamily Acordulecerinae 



Body (Fig. 25) subcylindrical, tapering caudad, venter flattened, 

 thorax distinctly swollen; segmentation distinct; annulation indistinct, 

 third abdominal segment with apparently three annulets, all annulets 

 tuberculate, setiferous; thoracic legs 5-segmented, spreading laterad, distal 

 segment consisting of a sharp recurved claw and caudal membranous 

 globose swelling; prothoracic legs one-half as large as metathoracic; 

 larvapods rudimentary on abdominal segments 2-7 and 10, increasing in 

 size from cephalic pair to sixth pair; tenth abdominal segment truncate, 

 small, without suranal processes; antennae flattened, apparently 1-seg- 

 mented; abdominal segments 2-4 or 2-5 and 8 with crescentic sucker-like 

 protuberances, one on each postsubspiracular protuberance; ventral 

 glands wanting; spiracles not winged; glandubae wanting. 



The Acordulecerinae, according to MacGillivray (1906), is represented 

 on the North American continent by a single genus, Acordulecera. Rohwer 

 would divide the subfamily into two tribes, Acordulecerini and Conocoxini, 

 the former including besides Acordulecera, Pantherix and possibly 

 Thulea and the latter Conocoxa and Nithulea. A radically different 

 arrangement is that of Konow who regarded Acordulecera as one of 

 fourteen genera included in his tribe Lobocerotides which was one of four 

 tribes constituting his subfamily Lophyrini. Konow seems to have been 

 unfamiliar with the larvae of the Nearctic genus Acordulecera, for he 

 speaks of the larvae of Lophyrini as "mit 16 Abdominalbeinen; an Coni- 

 feren." — a characterization not at all applicable to the genus under 

 consideration. The host-plant of two species of Acordulecera have been 

 recorded, and one species recognized in the larval stage. I have examined 

 larvae of several unbred species. 



Acordulecera Say 

 Larvae very small, length less than 12 mm., greenish, never spotted or 

 striped; head usually brownish or pale; annulation, 3, (2, 1); prothorax 

 constricted; annulets with transverse row of slight tubercles, each bearing 

 slender peg-like setae; lateral lobes distinct; tenth abdominal tergum with 

 several setae; suranal and subanal lobes with several setae; maxillary palpi 

 rather slender, uniformly tapering distad; mandible thick; labial palpi 

 small; ligula dilated, rounded; free leaf-feeders; gregarious. 



SPECIES OF ACORDULECERA 



1(4) Sucker-like protuberances on abdominal segments 2-5 and 8 2. 



2(3) Head with vertex blackish brown, front distinctly lighter in color; legs whitish 

 concolorous with body; sucker-like protuberances with three marginal setae; length 

 9.5 mm.; width of head 1.2 mm.; on butternut; Y-8.93(?)-2-2. . .Acordulecera sp. 1. 



3(2) Head with vertex light brown, epicranial stem deep brown, front sometimes deep 

 brown; in young specimens head entirely dark brown; legs brown; sucker-like 



