425) LARVAE OF THE TENTHREDINOIDEA—YUASA 107 



tergum connected along the caudal margin; black marking of tenth sternum large, 

 completely covering the sternum, and with its cephalic margin between the subanal 

 appendages straight; antennae with formula, (3, 5), 2, 1, 7, (6, 4); length, 18 mm.; 

 width of head, 1.7 mm.; on plum; G NeurolomainconspicuaNorton. 



18(15) Tenth abdominal tergum either with a colored patch on each side and with a median 

 triangular patch between the cephalic ends of the lateral patches always present, the 

 lateral patches sometimes not connected along the caudal margin of the tergum, 

 the sternum with a large colored patch; or the tergum without colored patches and 

 the sternum either with a pair of small round spots or without markings 19. 



19(22) Tenth abdominal tergum with two lateral triangular patches and one mesal patch 

 and sternum with a large colored patch 20. 



20(21) Head blackish; body greenish-white; subanal appendages with the first segment longer 

 than the other two taken together, all segments pale brown, the third sometimes 

 darker; following parts blackish: head uniformly, antennae, prothoracic shields, 

 thoracic lateral lobe, markings on ultimate segment, suranal hook, cervical sclerites, 

 and coxae; antennae with formula, (3, 2), 5, 1, 7, (4, 6); eighth uromere with a pair 

 of marginal ventral glands near caudal portion of the sublateral lobe, both pale 

 brown; in life, body glossy white with diffused fleshy-reddish tint; antennae and 

 subanal appendages whitish; length, 19 mm.; width of head, 1.9 mm.; on Cornus; 

 nests made by rolling edges of leaves cut across from the margin to the midrib; 

 gregarious; Y-125 Pamphilius sp. 1. 



21(20) Head light brown, with a black spot on the apex of front; subanal appendages with 

 the first segment nearly equal in length to the other two taken together, two proximal 

 segments creamy, third deep brown; body whitish green; ocularia brown, a black spot 

 at the origin of the epicranial arms; following parts brown: thoracic shields, cervical 

 sclerites, and markings on the ultimate segment; tenth abdominal tergum with a 

 median cephalic triangular patch between the lateral patches; subanal appendages 

 with second segment longer than half the length of the third; thoracic legs pale or 

 creamy; antennae, beyond the first segment, deep brown, with formula: (2, 3, 5), 



1, 7, (4, 6); length, 19 mm.; width of head, 1.8 mm.; on blackberry; G 



Pamphilius dentatus MacG. 



22(19) Tenth abdominal tergum without colored patches 23. 



23(26) Tenth abdominal sternum without a pair of small colored patches 24. 



24(25) Head uniformly pale brown; subanal appendages with the first segment as long as 

 other two taken together, the second shorter than the third, all segments pale brown; 

 ocularia large, about one-third the diameter of antenaria, black; following parts 

 blackish brown: narrow prothoracic shields, cervical sclerites, and antennae; suranal 

 hook brown without colored base; antennae with formula, (2, 3), 5, 1, 7, (4, 6); 

 length, 12 mm.; width of head, 1.5 mm.; host unknown; Y-163-3. (This species 

 closely resembles P. persicus MacG.) Pamphilius sp. 2. 



25(24) Head not uniformly pale brown, vertex brown, front with a brown spot; subanal 

 appendages with the first segment as long as the other two taken together, distal 

 two segments brownish; following parts brown: prothoracic shields, cervical sclerites, 

 antennae, and suranal process; legs pale brown, darker in young specimens; length, 

 17 mm.; width of head, 1.8 mm.; on blackberry; M-69 Pamphilius sp. 3. 



26(20) Tenth abdominal sternum with a pair of small colored patches; head pale to light 

 brown, front sometimes with a brown spot, usually without it; subanal appendages 

 with the first segment nearly equal in length to other two taken together, the second 

 segment shorter than the third, all segments pale to brownish; ocularia and mandible 

 at distal end blackish brown; suranal process brown with its base pale; antennae 



