120 



Strongylogaster, Dahlb. 

 Section 1. Tribe 1. 



Terminalis, Say. All. melisoma, H. Cat. 



Mellosus, Norton. 

 ^ Apicalis, Say. 

 ' Abdominalis, Norton. 

 ' Epicera, Say. 

 ^ Eufocinctus, Norton. 

 ' Pinguis, Norton. 



Pallipes, Say. 

 ° Multicolor (n. sp.) 



Tribe 2. 



Tacitus, Say. 

 ^"Kufescens, Norton. 

 ^^ Unicus (n. sp.) 



Multicinctus, Norton, Proc. Ent. Soc. Phil. I. 143. 



Section 5. Tenthredo. 

 "Tardus, Say. 

 Atroviolaceus, Harris. 

 Piceocinctus, Norton. 



7 The males seldom have any middle under-wing cells. 



8 Some of the males have one cell, and some no under-wing cells. A female 

 has two cells in one under-wing, and one in the other. Some females have no 

 middle under-wing cells. 



9 Strongylogaster multicolor (n. sp.) ^f . (Length 0.24, Ex. 0.48 in.) 



cf. Piceous, rufous, yellow and black; antennae flattened, especially the third 

 and fourth joints, third hardly longer than fourth, color piceous, two basal joints 

 black ; head yellow, with a large black vertical spot ; clypeus angulate emargi- 

 nate ; thorax black ; tegulae, collar, a stripe on pleura, coxffi and base of femora 

 yellow ; abdomen and legs rufous or honey-yellow, a few black spots on basal 

 segments of tergum ; tarsi above blackish ; wings hyaline, basal half of stigma 

 bright yellow. 



One specimen from Maryland ; taken May 28. Mr. Uhler. 



This resembles Tentliredo semiluteus, but can readily be distinguished by its 

 short antennse. It has no middle under-wing cells. 



1" Strongylogaster unicus (n. sp.) ? . (Length, 0.28, Ex. 0.56 in.) 



5 ■ Color luteous, head and legs black ; antennas black, shorter than those of 

 tacitus, third and fourth joints equal ; clypeus rough with deep pits, not emargi- 

 nate ; mandibles rufous ; tegulse, edge of collar, basal plates, ovipositor sheath 

 and legs black ; anterior femora and tibiaj rufous before ; wings blue-black, semi- 

 transparent. 



One specimen. New York. J. Akhurst. 



In this and in tacitus the third submarginal wing cell is longer than in Tribe 1. 

 The color of the body is paler than that of tacitus. 



11 1 see no difference in T. tardus and T. atroviolaceus, except in the color of 

 the abdomen ; the first being red, and the second black. I have a specimen with 

 the basal segments only rufous, and have examined another with a rufous band 

 on the third and fourth segments of abdomen, and the remainder black. Both 

 sexes in both species have very long hinder tibiae. 



12 N(fl seen since iirst described ; supposed to belong in this tribe. 



