402 O.K. CROTCH, M. A. 



Var. simplex. Lee. Ann. Lye. v., p. 202. — Posterior femora piceous, knees yel- 

 low ; female with the elytra smooth. 

 San Diego. (Leconte.) 



Var. oregonensis. — Elytra paler, more thinly irrorated with black, fascia 

 paler and more distinct, posterior femora pale. 

 Oregon. (Horn.) 



Var. latiusculus, Lee. Pac. R. R., p. 34. — 9 • — Testaceous beneath, sulci as in 

 type. 



Var. abbreviatus, Aube, Spec, p. 134. — % £>. — Larger, femora testaceous, 

 Bulci in the female almost reaching the base. 



Russian America (Horn). Oregon (Leconte.) 



A. mediatns, (Say) Tr. Am. Phil, ii., p. 33. — Allied to A. semisulcatus, but 

 smaller, narrower, not enlarged behind, less thickly punctate beneath, pos- 

 terior femora black (knees testaceous), sub-apical fascia more clearly defined. 

 L. -48 inch. 



Nebraska, Pennsylvania, Georgia. 



A. fraterilUS, Harris, N. E. F. vii., p. 156. — Closely allied to A. semisulca- 

 tus, but larger, the mark on the vertex is not defined, the thoracic lines are 

 broader, the posterior femora almost entirely black; the sulci in the female 

 are sub-equal and short. 



Var. — Elytra smooth, punctate. 

 Pennsylvania, Massachusetts, Illinois. 



TIIERMOKECTES, Esch. Dej. Cat. (Type ornalicoJUs.) 

 Allied to Acilius in the sternal characters by its smooth surface and 

 by the anterior tarsi of the male, which are patellate and clothed with 

 one larger basal and numerous very small, equal, discs; the females 

 are marked with deep short striae. 



Th. basilaris, (Harris) N. E. Farm., 1829, p. 8. — Convex, regularly ovate, 

 dark testaceous, legs and antennae paler, surface scarcely punctulate, black, 

 head in front and a transverse line on the vertex fulvous; thorax with the 

 sides broadly and a narrow diseoidal transverse line fulvous; elytra with a 

 sub-basal fascia, the external margin and some vague irrorations also fulvous. 

 L. -3 :— 40 inch. 



Pennsylvania, Canada, Georgia, Texas. 



Var. intermedins.— Thorax without the medial line, elytra with a huineral 

 vitta and a mere trace of the basal fascia; under surface rufo-testaceous. 

 California. ( Horn.) 



Var. litecinctus, Lee. Ann. Lye. v., p. 203. — Similar to the type, but the ely- 

 trai margin broader and more distinct. 



Th. ornaticollis, Aube, Spec, vi., p. 140, 9. — Ovate, sub-depressed, rufo- 

 testac'ous beneath, above fulvous; head colored as in Acilius semisulcatus, tho- 

 rax with two transverse blue lines (the anterior very narrow, the posterior 

 broad and biarcuate) and the base itself darker; elytra irrorated with small 



