NORTH AMERICAN COLEOPTERA. ' 65 



3. — Elytra very densely and finely punctured, tlie punctures so dense as to be 



indistinct as such 4. 



Elytra closely punctate, but the punctures are distinctly separated 5. 



4. — The yellow vittse of elytral disc attenuate to apex 1. tonieiitosa. 



The yellow vittae broad, parallel and entire 4. caiistdeiisis. 



The yellow vittse divided at middle by a fine black line; thorax coarsely 

 punctate and subopaque; body beneath almost entirely piceous. 



5. gem ill at a. 



5. — Elytra normally vittate, as in canadensis 3. virgata. 



Elytra almost entirely pale, the darker vittse indistinct or obliterated. 



6. cadiica. 



6. — Thorax smooth, impunctate; head with small occipital spot; elyti'a subtrun- 



cate, sutural angle acute, or even slightly prolonged....?, nitidicollis. 



Thorax more or less punctate and impressed 7. 



7. — Occiput with a small piceous spot; elytra very finely punctate. .9. didiicta. 



Occiput with transverse piceous space 8. 



8. — Punctuation of elytra comparatively rough. 



Elytra normally vittate 10. coiivergeiis. 



Elytra entirely blue, except border 13. flavoliiiibata. 



Punctuation of elytra fine and dense. 



Elytra yellow, with slender blue vittfe, resembling nitidicoUis. 



8. L.ewisii. 

 Elytra blue, with a short discal vitta attenuate to apex, as in tomentosa. 



11. atteiiiiata. 

 Elytra green, blue, or purple-black 12. luteocJiicta. 



By a rare exception, specimens of luteocincta have a dull, yellow, 

 indistinct vitta. 



T. tomentosa Linn., Syst. Nat. ed. xii, p. 601 ; Lee, Proc. Acad. 1865. p. 

 220; bacharklis Weber, Abs. Ent. p. 57; Fab., Syst. El. i, p. 480; Oliv., Ent. vi 

 p. 629, pi. 3, fig. 34; lampyroides Gmel., Ed. Linn, i, 4, p. 1731.— Form oblong, 

 slightly broader behind ; anteunje entirely piceous when fully mature, the fifth 

 joint distinctly longer than the third. Head testaceous, with a small occipital 

 spot piceous, surface coarsely obsoletely punctate. Thorax not quite twice as 

 wide as long, the angles usually prominent, sides obtusely angulate, but variable, 

 disc with a vague depression each side of middle variable in extent, surface 

 sparsely indistinctly punctate, color yellowish with the usual three piceous spots ; 

 scutellum piceous, sometimes margined with testaceous ; elytra piceous, opaque, 

 the entire margin from humerus to apex testaceous, the disc with a testaceous 

 vitta broader at base, gradually narrowed to tip, extending three-fourths to apex, 

 surface densely finely punctate, and finely, inconspicuously pubescent ; epipleur£e 

 always pale ; pro- and metasternum always pale, metasteruum at least piceous at 

 the sides. Abdomen pale at middle and piceous at sides, or at times entirely 

 piceous. Legs yellowish testaceous, the outer side of the front tibia, the tips of 



the middle and hind tibise and the tarsi piceous. Length .34 — .40 inch.; 8.5 



10 mm. 



Male. — Last ventral segment broadly, but not deeply eraarginate ; claws slightly 

 bifid at tip, the two divisions equal in length. 



Female. — Last ventral obtuse, entire; claws more deeply bifid, the inner divi- 

 sion a little shorter and more divergent. 



TKANS. AM. ENT. SOC. XX. (9) APRIL, 1893 



