OF NATURAL HISTORY. G73 



cous : tergum pale yellowish on the basal disk, blackish brown 

 at tip : venter more or less yellowish-white, dusky or blackish at 

 tip : feet and coxae whitish-green. 



Var. a. Feet and part of the costal rib green ; scutel and pos- 

 terior portion of the stethidium whitish. [211] 



Var. /?. Thorax and abdomen entirely black. 



Length three-twentieths of an inch. 



This insect is common. 



HYLOTOMA Latr. 



1. H. SCUTELLATA. — Fulvous ; head and thorax, excepting 

 the humerus and scutel, blackish. 



Inhabits United States. 



9 Body reddish-yellow : head blue-black : thorax blue-black ; 

 each side before the wings, including the superior portion of the 

 pleura, reddish-yellow : scutel elevated, bright reddish-yellow : 

 metathorax with two oblique, oblong, white spots : wings dusky 

 violaceous : pectus, neck, incisures of the stethidium (and feet ?) 

 blue-black : anal segments at tip black. 



Length nine-twentieths of an inch. 



I do not remember in what part of the Union I found this 

 species. The feet in the specimen are mutilated. 



2. H. CALCANEA. — Blackish ; thorax yellow; tarsi whitish at 

 base. 



Inhabits United States. 



Violaceous black : thorax with the anterior superior portion of 

 the pleura yellow; suture of the anterior segment, or collar, 

 blackish : wings dusky violaceous : tarsi at base white. 



Length less than seven-twentieths of an inch. 



I have also lost the particular locality of this species. They 

 do not correspond with either of the species described by Dr. 

 Leach. [212] 



ATOMACERA Say. 



Generic cAorocter.— Body rather short : antennae with but three 

 obvious joints; in the male ciliated : cellules, one radial, uuap- 

 pendiculated; three or four cubitals, the dividing nervure of the 

 first and second being obsolete : tibiae destitute of a spine in 

 their middle. 

 1835.] 43 



