OF NATURAL HISTORY. 775 



The scutelliform base of the metathorax is more or less sculp- 

 tured with slightly elevated, longitudinal lines. 



5. H. PARALLELUS. — Black ; tergum banded : wings and feet 

 ferruginous. 



Inhabits Indiana. 



9 Body black, somewhat hairy ; hairs yellow-cinereous : nasus 

 ciliate with ferruginous hairs which extend over the labrum : 

 antennse with the third joint but little longer than the fourth : 

 wings pale ferruginous, dusky at tip ; second cubital cell quad- 

 rate, the basal and terminal nervures being quite parallel : ter- 

 gum, each segment with a very obvious posterior margin of 

 whitish-yellow hairs : feet ferruginous, the base of the thighs 

 and coxae more or less blackish. 



Length less than half an inch. 



CERATINA Latr. 

 C. DUPLA. — Blue ; much punctured. 

 Inhabits Indiana. 



9 Body deep blue, densely punctured, a little polished : an- 

 tennse black : nasus with a white spot, sometimes obsolete : tho- < 

 rax with an impressed line ; disk with few punctures and more 

 polished : wings but slightly dusky ; nervures blackish : wing- 

 scale dark piceous, impunctured : [398] tergum more densely 

 punctured towards the tip; basal segment on the anterior face 

 impunctured, polished ; remaining segments with a distinct hne 

 on their anterior submargins, curving backward on each side; 

 between this line and the basal edge, particularly on the third 

 and fourth segments, the surface is but little punctured and i.s 

 polished, resembling a small segment: feet blackish, with pice- 

 ous tarsi and whitish hair: pleura with a small yellow point 

 under the wing-scale. 



Leno-th a little over three-tenths of an inch. _ 



% Nasus and quadrate spot on the labrum, white ; anterior 

 tibiae whitish on their exterior edge. 

 Length one-fourth of an inch. 



The spots on the nasus, labrum and pleura as well as the line 

 on the tfbiae in the male corresponds with those of the male o^ 

 a aWUalrls F.,but the general color is altogether different. A 

 1837.] 



