OF NATURAL HISTORY. T"'! 



nent : wings dark violuceo-fiiligiTums ; nervure.'i Muc-kiHli ; .sti;;ui:i 

 honey-yellow ; second cubiUil cellule (juadrangular, attached t'» 

 the radial coilule by a sli^ditly jictiolatod angle ; first rccurriMit 

 ncrvurc with a proiuiiiont [247] process and a small while s|H»t; 

 second recurrent nervure much undulated, margined with white 

 one half its length ; exterior nervure of the cellule with a white 

 spot: feet, anterior pairs, excepting the coxje and trochanters, 

 honey-yellow ; posterior pair black, their tar.-i yellow. 

 Length at le:ist half an inch. 



2. B. ^QUATUS. — Ulack; antenna; and feet, excepting the 

 hinder thighs yellow. 



Inhabits Indiana. 



Body black : antennao yellow, at tip and base a little dusky : 

 hypostoma with two slight lobes situated longituflinally, and with 

 the mouth and orbits yellow : thorax with a slightly indented line 

 each side before and another over the wings : wings violacco-fuligi- 

 nous; nervures and stigma blackish, the latter with a whitish dot at 

 its stricture ; second cubital cellule pentangular, the two angles on 

 the costal side rectangular and the three corresponding sides 

 eijual, the two anal sides shorter than equal, two sides with a 

 white spot, and the two recurrent nervures with each a white 

 spot : wing-scale and junction of the wings with the thorax honey- 

 yellow : feet, anterior pairs honey-yellow ; posterior pair with the 

 tibiic and tarsi yellow. 



Length about half an inch. 



It has much resemblance to Ar/alhis ])olit(t nob. 



3. B. FUCITIVUS. — Second cubital cellule petioluted ; posterior 

 tibiae annulate. 



Inhabits Indiana. 



Body black : antcnnie in both sexes black : mandibles and 

 palpi white : wing-scale white : wings hyaline ; nervures black, 

 whitish at base ; second cubital cellule very small, petiolated 

 from the radial cellule: metathorax [248] not obviously ex- 

 cavated behind, but with somewhat raised lines; abdomen ar- 

 cuated ; towards the tip rather abruptly clavate ; punctures very 

 small : oviduct as long as the tip of the abdomen : feet honey- 

 yellow, with a white reflcotion j posterior tibiae white with black 

 1835.] 



