3691 LARVAE OF THE TENTHREDINOIDEA—VUASA 51 



10(11) Clypeus with three setae on each side of meson; mandibles with two setae; maxillae 

 with palpifer produced dorsad as a triangular lobe; labrum with a deep median 



emargination with a row of secondary setae caudad of the emargination 



Erlocampa Hartig. 



11(10) CI>-peus with two setae on each side of meson; mandibles with one seta; maxillae 

 with palpifer not produced dorsad as a triangular lobe; labrum without a deep 

 median emargination 12. 



12(13) Thoracic legs with trochanter longer than tibia. . . .Strongylogaslroidea Ashmead. 



13(12) Thoracic legs with trochanter distinctly shorter than tibia 14. 



14(15) Body spotted or transversely striped; head dorsad of ocellarae entirely blackish or 

 brownish; very large and robust larvae Macremphytus ISIacGillivray. 



15(14) Body never spotted or transversely striped; head dorsad of ocellarae not entirely 

 blackish or brownish; smaller larvae 16. 



16(17) Labial palpi with segment 1 longer than segment 2; legs with femur always longer 

 than tibia; tibia usually twice as long as trochanter; body rather robust; head not 



marked distinctly with brown; annulet 4 longest on third abdominal segment 



Monoslegia Costa. 



17(16) Labial palpi with segment 1 shorter than segment 2; legs with femur not alwaj's 

 longer than tibia; tibia always more than twice as long as trochanter; body rather 

 slender; annulet 4 not longest on third abdominal segment 18. 



18(19) Head entirely pale, no markings; legs with femur longer than tibia; body on dorsum 



not shaded darker than the venter; tenth abdominal tergum not marked 



Monosoma MacGillivray. 



19(18) Head not entirely pale, usually with brown spots or markings; legs with femur 

 not always longer than tibia, often subequal; body on dorsum sometimes shaded 

 darker than the venter; tenth abdominal tergum often marked 20. 



20(21) Legs with femur always longer than tibia; tenth abdominal tergum usually marked ; 

 body on dorsum usually shaded darker than the venter Emphytus Klug. 



21(20) Legs with femur subequal to or shorter than tibia; tenth abdominal tergum usually 

 unmarked; body on dorsum not usually shaded darker than the venter 22. 



22(23) Tenth abdominal tergum marked with a spot; body on dorsum shaded darker than 



the venter; labial palpi with segment 2 longer than segment 1 



Unitaxomts MacGillivray. 



23(22) Tenth abdominal tergum unmarked; body on dorsum not shaded darker than the 

 venter; labial palpi with segment 2 subequal to or shorter than segment 1 24. 



24(25) Labrum with a distinct median depression Taxonus Hartig. 



25(24) Labrum without a distinct median depression Phrontosoma MacGillivray. 



26(5) Tenth abdominal tergum and prothoracic and mesothoracic tergites with con- 

 spicuous fleshy pointed protuberances; thoracic legs not normal in form, with 

 trochanters obsolete Dimorphopteryx Ashmead. 



Subfamily Selandriinae 



Larvae (Fig. 9) small to fairly large, length 18-26 mm.; body cylindrical 

 and gradually tapering caudad; segmentation and annulation distinct and 

 fine; larvapods on abdominal segments 2-8 and 10; third abdominal 

 segment with seven annulets, annulets 1, 3, and 5 setiferous, annulets 3 

 and 5 with glandubae; thoracic legs normal in form except tibia sometimes 

 very minute; body uniformly greenish, without colored markings; head 

 with or without brownish spots; antennae with five segments, long, conical; 



