OF NATLUAL lU.STOaY. 705 



Rostrum distinct : head piceous; aiitoiina- l.huk ; [252J tho- 

 rax polished ; wings purplish-fuliginous, with three nr four ob- 

 solete, small, white spots; cellules regular; tergum with numer- 

 ous longitudinal, elevated lines on each segment ; lirst se<'ment 

 with the lines transverse and interrupted by a large, elevated 

 oval lobe on the disk, which has a longitudinal line and irregu- 

 lar rugae ; the lateral edge elevated ; second and third segn>cnt« 

 with an ohliifue indented line at base each side ; oviduct two- 

 thirds the length of the abdomen, black, clothed with short hairs ; 

 feet pioeous-black. 



Length 5 three-tenths of an inch. 



The remarkable appearance of the tcrguni readily distinguishs 

 this species from j)')pu/i((or noh., which it resembles. It haa 

 a general resemblance to Ji. initiulor Fabr. 



3. B. IIEBETOR. — Black"; head, thoracic lines, tibia; and base 

 of the abdomen honey-yellow. 



Inhabits Indiana. 



Body black, polished; head pale honey -yellow; antennae, re- 

 gion of the stemmata, of the antenna; and spot on the hypostomn, 

 black ; mandibles robust, black at tip ; thorax with two obsolete, 

 piceous, obliijue lines confluent at the middle and terminating in 

 a spot each side of the scutel ; wiugs dusky, nervures black ; 

 stigma rather large; nervure from the stigma, oblique to the 

 second cubital ; abdomen depressed, oblong-ovate ; coxjc, knees 

 and base of the tibiae, yellowish-white : oviduct shorter than the 

 abdomen. 



% Abdomen whitish at base. 



Length nearly one-tenth of an inch. 



The antennae of the male arc twenty-two-jointed and those of 

 the female are short, more robust, fourteen-jointed. The short, 

 thoracic piceous lines have .sometimes a cruciform appearance by 

 being continued around the scutel. [253] 



4. B. DORSATOR. — Yellowish, antennae, three thoracic lines 

 and tip of the tergum, black. 



Inhabits Indiana. 



Body yellowish, somewhat fulvous, a little polished : antenna? 

 short, rather robust, black ; area of the stemmata blackish : tho- 

 1835.] 45 



