342 APPENDIX. 
stout, shorter than the thorax; first joint incrassated. 
Metathorax transversely and minutely rugulose, with an 
indistinct middle impressed line. Abdomen‘fusiform, a 
little longer than the thorax; hind borders of the seg- 
ments almost smooth. Hind tibiz slightly tuberculate. 
Wings ochraceous, blackish at the base, brownish at the 
tips. _ Length of the body, 11 lines; of the wings, 16 
lines. 
LIST OF SPHEGID. 
Ammophila. (Kirby.) Apathus. 
luctuosa. (St. Farg.) insularis. (Sm.) 
Pelopeus. (Latr.) Bombus. 
architectus. vinatus. 
vagans. 
APID:. *flavifrons. (Smith.) 
dndrena cealifornicus. 
vicina. TENTHREDINIDZE. 
victima. Sirex. . 
perplexa. *varipes. (Walk.) 
nivalis. albicornis. (Fuabr.) 
Osmia. Chrysis. 
simillima. *smaragdicolor. (Walk.) 
Order HYMENOPTERA. 
Fam. Urocertp2. (Leach.)—Genus Srrex. (Linn.) 
Sirex varipes. 
Fem.—Nigricante cyaneus; antennis nigris; abdomine 
purpurascente cyaneo, apice impresso ; oviductus vaginis 
abdominis dimidio brevioribus; pedibus rufis; tibiis 
supra nigris ; alis cinereis. 
Female.—Blackish blue, clothed with black hairs. 
Antenne black. Abdomen purplish blue, with a nearly 
circular excavation atits tip. Sheaths of the ovipositor 
