KEY TO THE LONG-HORNS. 



Phytceciini. (See page 353.) 



1 . Each eye not divided but the outline deeply indented ; 

 thorax cylindrical 2. 



Each eye completely divided so that there appear to 

 be four eyes; thorax dilated or tuberculate on the sides ... 9. 



2. Antennae without hairy pile 3. 



Antennae with thick, long hairs; black, feebly shining; 



top of head, a stripe on each side of the pronotum, and often 



the margins of the elytra, yellowish; .3 in. long 



A mphionycha flammata. 



3. Nearly uniform gray above; tarsal claws feebly 

 toothed or cleft. Breed in stems of herbs 



Mecas, usually inornata. 



Not uniform gray above; tarsal claws broadly toothed; 

 .3 to .7 in. long. Oberea 4. 



4. Pronotum with small, rounded, black elevations or 

 callosities 5. 



Pronotum without callosities 8. 



5. Pronotum with four callosities; usually pale, dull 

 yellow; elytra, antennas, and tarsi often nearly black. 

 Breeds in living twdgs of cotton-wood 0. scliaumii. 



Pronotum with tw r o callosities, and often a third spot, 

 black. There are several named color- varieties of each 

 of the following species 6. 



6. Tips of elytra rounded; body, below, and femora 

 entirely red; head and thorax usually red, rarely more or 

 less black ; two rounded, black spots on middle of pronotum ; 

 elytra black. Probably breeds in blackberry stems. 



0. ocellata. 

 Tips of elytra rather square-cut 7. 



7. Shining black except the pronotum, which is yellow 

 with two, or three, black spots. Breeds in the canes of 

 raspberry and blackberry 0, bimaculata. 



Typically, the body, beneath, is largely yellow but 

 it is sometimes wholly black; pronotum yellow with three 

 black spots; each elytron with a wide, dull yellow stripe 

 bordered with blackish. Breeds in cottonwood and 

 blackberry 0. tripunctata. 



8. Thorax pale reddish-yellow; antennas, elytra, tibiae, 

 and tarsi, nearly black; pronotum without black spots; 



