APPENDIX. 321 



FOENUS, Fabr. 



F. tarsatorius. Black ; feet pale rufous ; posterior tibia 

 blackish, at base white. 



Inhabits Penns54vania. 



Jlntennse. black-testaceous beneath towards the tip; 

 mandibles testaceous, at tip black ; hypostoma each side 

 silvery; stethidiiim immaculate, confluently punctured ; 

 ivings hyaline, nervures fuscous ; anterior and interme- 

 diate feet pale rufous, the tibiae with a whitish line, the base 

 of the tarsi white ; posterior feet piceous, tibiae blackish, 

 clavate, a white band near the base, which is much dilated 

 before; tarsi white at base, the first joint with a black ori- 

 gin; «6fl?owzen blackish, with about three dull testaceous 

 spots on each side ; oviduct pale testaceous ; valves black- 

 ish, at tip whitish. 



Length of the body eleven-twentieths of an inch. 



SIGALPHUS, Zafn 



1. S. sericeus. 9 Black; tergum sericeous; tibia ochre- 

 ous at base. 



Inhabits North-west Territory. 



Head with dilated, transversely confluent punctures; 

 nasus minutely punctured ; thorax with much dilated, ir- 

 regularly confluent punctures ; scutel polished, almost im- 

 punctured on the disk, lateral margin grpoved; wings 

 slightly fuliginous, nervures fuscous, those of the base very 

 pale brownish; metatkorax with very large, somewhat dis- 

 coidal punctures ; tergum without obvious incisures, black, 

 covered with short, dense, cinereous, sericeous hair ; obtuse 

 •at tip; venter excavated; anterior pairs offset black, se- 



