OP NATURAL III8TORV. 77", 



The scutelliform base of the metathorax is uioro or less .sculp- 

 tured with slightly elevated, longitudinal lines. 



5. II. PARALLELUS.— Black ; tcrgum banded : whv^ and feet 

 I'errugiuous. 



Inhabits Indiana. 



9 Body black, somewhat hairy ; hairs yfllow-cinoreous : nxsu-. 

 ciliatc with ferruginous hairs which extend over the lubrum ; 

 antenna) with the third joint but little longer than tho fourth : 

 wings pale ferruginous, dusky at tip ; second cubiul coll .jua-l 

 rate, the basal and terminal ncrvures being ^uite parallel : tor 

 gum, each segment with a very obvious posterior margin of 

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

 and coxa) more or less blackish. 



Length less than half an inch. 



CERATINA Latr. 



C. DUPLA. — Blue; much punctured 



Inhabits Indiana. 



2 Body deep blue, densely punctured, a little poli.shed : an- 

 tcnnaj black : nasus with a white spot, sometimes ob.solctc : tho- 

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

 polislied : wings but slightly dusky ; nervurcs blackish : wing- 

 scale dark piccous, impuncturcd : [398] tergum more densely 

 punctured towards the tip ; basal segment on the anterior face 

 impuncturcd, polished ; remaining segmeMt>< with a distinct Une 

 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." 

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

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

 under the wing-scale. 



Length a little over three-tenths of an inch. 



% Nasus and quadrate spot on the labrum, white ; nntcrif»r 

 tibia; whitish on their exterior edge. 



Length one-fourth of an inch. 



The spots on the nasus, labrum and pleura, as well a.s the lino 

 on the tibioo in the male corresponds with those of the male of 

 0. albilabns F.,but the general color is altogether different. A 

 1837.] 



