381] LARVAE OF THE TENTHREDINOIDEA—YUASA 63 



maxillary palpi usually with segments 2 and 4 subequal in length; mandible 

 with two setae; labrum with three setae on each side, with median longitu- 

 dinal depression; trochanter distinctly shorter than femur; head and 

 body in life usually coated with a thin whitish waxy bloom; dorsal vessel 

 usually showing thru cuticle as a dark fine line; setae microscopic; gland u- 

 bae shorter or longer than adjacent setae; length, 16-21 mm. 



SPECIES OF MACROPHYA 



1(4) Head pale brown, with or without a minute brown spot at the caudal end of epi- 

 cranial stem; body on dorsum with light or pale grayish band, darker along supra- 

 spiracular lines, band sometimes obsolete; venter whitish, including legs and 

 larvapods; tenth abdominal segments unmarked; labial palpi with distal segment 

 twice as long as the preceding segment; glandubae very small, shorter than adjacent 

 setae; setae microscopic; head and body coated with thin waxy bloom; on Primus 

 serotina; subgregarious 2. 



2(3) Larger species, length, 20 mm.; width of head, 1.8 mm. ; annulation, (1, 5), 3, (4, 6, 7), 



2; antennae, (2, 1), (3, 4, 5); maxillary palpi, 2, (1, 3, 4); Y-126.-126-3-C-1 



flicta MacGillivray. 



3(2) Smaller species, length, 16 mm.; width of head, 1.8 mm.; annulation, (5, 1, 3), 4, 6, 



2, 7; antennae, 2, (5, 1, 4), 3; maxillary palpi, (2, 4), (3, 1); Y-59-3-1,-59-4-1 



fistula MacGillivray. 



4(1) Head with a large blackish spot on dorsal part of vertex, often with black spots 

 caudad of ocellarae; body with or without distinct grayish dorsal band, on latus with 

 rows of black or yellowish spots; venter usually whitish; pedal line sometimes with 

 fine gray markings 5. 



5(8) Body entirely whitish; head on vertex usually with a dorsal spot not expanding 

 distad; without spots caudad of ocellarae 6. 



6(7) Body with a row of small black spots along supraspiracular lines, two spots to each 

 segment, cephalic spot larger than caudal; tenth abdominal tergum unmarked; 

 annulation, (1, 3, 5) (4, 7), (6, 2); antennae, (4, 1), 2, 3; legs with femur more than 

 twice as long as trochanter, tibia shorter than femur, coxa with grayish marking; 

 glandubae longer than adjacent setae; length of body, 22 mm.; width of head, 2.3 

 mm.; on Sambucus; Y-8.11,-11 tibiator Norton. 



7(6) Body without a row of small black spots along supraspiracular lines, but with 

 yellowish spots on latus instead, which are obsolete in alcoholic specimens; annula- 

 tion, (3, 5, 1), (2, 7, 4, 6); antennae. 1, (2, 3, 4, 5); maxillary palpi, (4, 2), (1, 3); 

 labial palpi with distal segment only one-fourth longer than the preceding segments; 

 legs with trochanter slightly shorter than tibia, femur slightly longer than tibia; 

 length of body, 22 m.; width of head, 2.2 mm.; on Sambucus racemosa; Y-8.11 

 -2(?)-3 e.pinota Say. 



8(5) Body not entirely whitish, dorsum with dark dorsal band; latus with one or more 

 rows of distinct black spots; head on vertex with a dorsal spot expanding distad, 

 broadly T-shaped, caudad of ocellarae with spots; tenth abdominal segment with a 

 minute black spot on caudo-meson; venter lighter in color 9. 



9(10) Body on latus with grayish band darker in color than dorsal band and with only 

 one row of distinct black spots; supraspiracular lines with a row of distinct spots; 

 dorso-lateral lines with a row of smaller, inconspicuous spots; subspiracular line 

 with very faint grayish spots, nearly obsolete ; pedal lines with grayish linear markings ; 

 annulation, 1, (3, 5), (7, 2, 4), 6; antennae, (1, 2, 3, 4, 5); maxillary palpi, (2. 4), 

 1,3; labial palpi with distal segment not quite twice as long as the preceding segment; 



