APPENDIX. 323 



2. B. popiilator. Black; abdomen red; wings dark fuli- 

 ginous. 



Inhabits United States. 



"5 9 Metathorax rough, with confluent punctures ; ah- 

 domen entirely reddish-fulvous ; oviduct black, longer 

 than the abdomen. 



Length of the body two-fifths of an inch. 



A very common insect in many parts of the United 

 States. The head and stethidium are sometimes dark pi- 

 ceous with the anterior portion of the thorax black. It re- 

 sembles B. initiator, Fabr. 



3. B. Iigat07\ Black, abdomen and feet rufous, antennae 

 with a white annulus. 



Inhabits Pennsylvania. 



9 Vertex and occiput impunctured ; annulus of the an- 

 /e;ina? placed beyond the middle; /?ff^i piceous; stethi- 

 dium with confluent punctures ; thorax with two dilated, 

 abbreviated, longitudinal, dull rufous lines ; scutel with a 

 dilated, longitudinal, dull rufous line ; wings hyaline, ner- 

 vures fuscous ; metathorax dull rufous ; feet rufous, tarsi 

 blackish at tip ; posterior thighs with a strong tooth be- 

 neath near the tip ; posterior tibiae fuscous ; posterior tarsi 

 whitish ; terguin punctured, glabrous at tip ; oviduct 

 blackish. 



Length seven-twentieths of an inch. 



4.B.stigmator. Dark yellowish-rufous; metathorax and 

 first segment of the tergum black. 



Inhabits North-west Territory. 



jlntennae as long as the body, dusky towards the tip ; 

 vertex between the stemmata black; occiput all refund the 

 neck, blackish ; metathorax above and on the sides black ; 

 pleura with a blackish, dilated, longitudinal line ; pectus 

 with a blackish, dilated line before the anterior feet, reach- 



