413] LARVAE OF THE TENTHREDINOIDEA—YUASA 95 



dorsad of each spiracle; on leaves and fruits of Smilacina racemosa; length, 18 mm.; 



width of head, 1.8 mm.; Y-73,-29-10,-8.73, M-181 fumtpennis Norton. 



Head brownish yellow; length, 17 mm.; width of head, 1.9 mm.; spots on dorsum variable; 

 body whitish with faint yellowish tinge; legs concolorous with body; supraspiracular 

 lines without smoky-black band; prothoracic spines 1-1-1 or 1-1-1-1:1:1:1 or 3; third 

 abdominal segment with 1-1 ; 1 :1-1-1 :1 :1 ; any of the dorsal tubercles may be wanting; 

 otherwise similar to the preceding species; Y; 20 specimens collected by Mr. J. R. 

 Malloch on Smilacina in Illinois Hypergyricus sp. 1. 



MONOPHADNOIDES ASHMEAD 



Larvae small, distinctly spinose, greenish; length less than 17 mm.; 

 body subcylindrical, tapering caudad, rather slender; spines furcate, 

 with two, three, or more branches; third abdominal segment with five, 

 apparently four, annulets, annulets 2 and 3 spinose; prothorax with spines, 

 5-2-l:(5 or 3):1:2; third abdominal segment, 2-2-2:0:(3 or 2)-2-2:2-l:l-2; 

 tenth abdominal tergum with a mesal furcate spine cephalad of caudal 

 marginal row of spines; legs rather slender, femur slightly longer than 

 tibia, not dilated at distal end; spiracles unwinged; maxillary palpi, 

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

 antennae, 5, (1, 2, 3, 4), sharply pointed and slender; semigregarious. 



Monophadnoides ruhi Harris. — Length, 16 mm.; width of head, 1.6 mm.; 

 head pale brownish green, distinctly setiferous, spines whitish, branches 

 sometimes light brown; length of longer branches subequal to the width 

 of head as seen in profile; tenth abdominal tergum with mesal spines with 

 2-3 branches, on the caudal third of the tergum cephalad of the marginal 

 row of spines, sometimes another smaller unbranched spine cephalad of 

 the furcate mesal spines; marginal row of spines, beginning with mesal 

 spine, consists of two simple, one bifurcate and lower, and lateral simple 

 spine on each side of meson; on Rubus and also on giant Ragweed; Y-8.17, 

 M-19,-183, G-562, 500-3. 



ISODYCTIUM ASHMEAD 



Larvae rather small, usually distinctly spinose; length less than 17 mm.; 

 body subcylindrical, tapering caudad, rather slender; third abdominal 

 segment with five annulets, annulets 2 and 4 spinose, sometimes appar- 

 ently four-annulate, with annulets 2 and 3 spinose; spines furcate, usually 

 with two to three branches, branches usually conspicuously long, some- 

 times small, short, but always sharply pointed at distal end; spiracles never 

 winged; thoracic legs normal, femur subequal in length to or longer than 

 tibia; head blackish or spotted on vertex and front or uniformly greenish; 

 spines on prothorax, 2-2-2-1:2-2:1:2; on third abdominal segment 2-2-2:1: 

 2-2-1:1:1; tenth abdominal segment with a marginal row of spines, usually 

 four on each side of meson. 



