AMERICAN HEMIPTERA. 59 



Genus BANASA Stal. 

 Stal did not separate this genus from Nezara in his Synopsis but 

 the next year he characterized it in the Rio Janeiro Heniipter- 

 Fauna, and in 1873 Uhler described it under the name Atoviosmi. 

 Distant says in the Biologia : " Tliis genus is closely allied to 

 Nezara. The body is subovate and less oblong, head sinuated on 

 each side, lobes of equal length and apex rounded. This is anothei- 

 of those genera in which the differences seem more apparent than 

 real ; the shape of the body and different coloration gives Banasa a 

 more distinct appearance from the genus Nezara than structural de- 

 tails fully carry out." The following key may assist in distinguish- 

 ing our species : 



Apical angle of the abdominal segments slishtjy jn-ominent, acuminate 1. 



Apical angle of the abdominal segments obtuse, not prominent 2. 



1. Head distinctly narrowed before ; edge of the abdomen with conspicuous black 



points; second joint of the antennse a little shorter than the third. 



ealva. 



Head broad before; margins of the abdomen with minute points; second joint 



of the anteniiie about half the length of the third . . . -(liiiii<Iiatii. 



2. Color clear green ; basal angles of the scutellum with a large white calloused 



spot eiiclilora. 



Basal angles of the scutellum without the white calloused spot ',i. 



3. Upper surface quite closely and regularly punctured !!«Oi'di<la. 



Upper surface with large distant punctures, irregularly disposed . Packard!. 



Baiiafita calva Say (catinus Dallas). 



After a careful study of a long series of this species and the diniidi- 

 ata I am compelled to change my former determination. Say's de- 

 scription of calva agrees perfectly with some southern specimens in niv 

 collection of the form I have formerly determined as catimts. Ma- 

 terial from the north in tliis species have the colors paler but do not 

 differ otherwise. They are a little larger and more attenuated pos- 

 teriorly than dimidiata; the head is very plainly narrower toward 

 the apex, which certainly is not the case in dimidiata ; the second joint 

 of the antennae is uniformly longer, and the colors are always paler 

 than is usual in dimidiata. On the venter the punctures along each 

 side are fewer and less strongly contrasted in calva ; the lateral 

 incisures are marked with a conspicuous black point, and the genital 

 segment of the male is narrower. About Buffalo this species is 

 tolerably abundant on various deciduous trees from August to Octo- 

 ber. I have received examples from Georgia and have seen others 



TRANS. AM. ENT. SOC XXX. MARCH. 1904 



