34-2 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 tibiae 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^E. 



Apathus. 



insularis. (Sm.) 

 Bombus. 



vinatus. 



vagans. 

 *flavifrons. (Smith.) 



californicus. 



(Kirby.) 

 luctuosa. (St. Farg.) 

 Pelopceus. (Latr.) 



architeetus. 



APIDJE. 



Aiulrena. 

 vicina. 

 viclima. 



perplexa. 

 nivalis. 



Os mi a. 



simillima. 



TENTHKEDINID^3. 



Sirex. 



*varipes. (Walk.) 

 albicornis. (Fabr. ) 



Chrysis. 



*smaragdicolor. (Walk.) 



Order HYMENOPTEEA. 



Fam. UKOCERID.E. (Leach.) Genus SIREX. (Linn.) 



Sirex varipes. 



Fcem. Nigricante cyaneus ; antennis nigris; abdomine 

 purpurascente cyaneo, apice irnpresso ; oviductus vaginis 

 abdominis dimidio brevioribus ; pedibus rufis ; tibiis 

 supra nigris ; alis cinereis. 



Female. Blackish blue, clothed with black hairs. 

 Antennae black. Abdomen purplish blue, with a nearly 

 circular excavation at its tip. Sheaths of the ovipositor 



