24 J. L. LECONTE, M. D. 



EROS Newra. 



Prothorax with five well-defined cells, the medial one rhombic, not carinate 2. 



Prothorax with aix cells, sometimes ill-defined, the middle anterior one more or 

 less carinate 6. 



2. — Fj)per surface scarlet 3. 



Upper surface in great part black, humeral spot and sometimes the sides of 

 prothorax fulvous; antennae with elongate, slender joints, second and third 

 united, scarcely as long as the fourth, trochanters triangular. Length 

 5 — 8 mm. Maine; Lake Superior tlioracicilS Rand. 



3. — Antennae slender^ third joint shorter than fourth; legs red 4, 



Antennae stouter, third joint equal to fourth , 5, 



4. — Red, antennae black, first joint red; ventral segments, sides of metathorax 

 and tarsi dark; trochanters of hind legs very long, acute at the angle: 

 middle trochanters also spinose but shorter; % antennae more than one- 

 half as long as the body, second and third joints united, not longer than 

 fourth; 9 antennae shorter, trochanters less acutely spinose. Length 13-5 — 



16 mm. Alaska; Vancouver Iiainatus Mann. 



Black beneath, red above, first joint of antennae and legs red, tarsi dusky; 

 trochanters short, triangular, not acute ; % antennas one-half as long as the 

 body, second and third joints united equal to fourth ; 9 antennae shorter, 

 third joint nearly equal to fourth. Length 8.5 — 11mm. Alaska; Oregon. 



siiiiplicipes Mann, 



5. — Very similar to simplicipes but the antennae are stouter, and distinctly serrate 

 upper surface, first joint of antennae and legs red, tarsi dusky; trochanters 



triangular. Length 8.5 — 13 mm. Vane; Or.: Gala Isetus Motsch. 



Black, ujiper surface scarlet; trochanters triangular, antennae less than one- 

 half as long as the body; legs black. Length 6 — 10.5 mm. L. Sup.; Ga. ; 



Can.; Or cocciaieiis Say. 



Colored and formed like hamatus, much smaller, trochanters long but not 

 spinose; antennae with first and second joints red; in % more than one- 

 half as long as the body, slightly serrate, second and third joints united 

 equal to the fourth; in 9 shorter and stouter, third joint comparatively 

 larger. Length 6 mm. Georgia niiindns Sny. 



fi.— Head not strongly margined before the antennae 7. 



Head strongly margined in front; EnofiftES Waterhouse. 

 Black, prothorax red, sometimes with black disc, six-celled, anterior middle 

 cell quadrate, carinate, posterior middle cell narrow; antennae elongate, 

 slender, third joint but little shorter than fourth, second less than one-half 

 as long ; trochanters long ; % antennae longer, outer joints narrower, front 

 more strongly margined, trochanters longer, tibiae less compressed than 

 usual and slightly bent; 9 trochanters shorter, more triangular, tibiae not 

 bent. Length 5 — 7 mm. Southern States sculptilis Say. 



7.— Anterior middle cell of prothorax with the sides indistinct, strongly carinate 

 at the middle, jjosterior middle cell narrow, like a channel: transverse 

 carinas between the anterior and posterior rows of cells strong, sinuate ;'•'■" 

 antennae as in sciifpti/i.i but second joint a little larger; trochanters tri- 

 angular and tibiae _straight in both sexes ; 9 antenna^ shorter and t^touter. 

 Length 8 — 10 mm. Atlantic slope hiinieriili!>$ Fab. 



* The posterior lateral cells are imperfectly divided by a short ti'ansverse ridge 

 proceeding from the median posterior cell. This species (hurneralis) is a central 



