208 GEORGE H. HORN, M. D. 



This species seems anomalous in its association with the following, 

 but there have been no structural characters found to separate it. 



Lefevre (Cat. Eumolp. p. 132) gives T. sturmi Lef. as a synonym, 

 and Jacoby states (Biol. Cent.-Amer. vi, i, suppl. p. 236) that chal- 

 ceus Lef seems to be but a color variety. 



Occurs from Virginia southward to Georgia, Texas, southern 

 California and through Mexico to Costa Rica (Jacoby). 



T. canellus Fab., Syst. El. il, p. .52 ; Oliv., Ent. vi, p. 915, pi. 2, fig. 3. 

 var. sexnotata Say, Jour. Acad, iii, p. 445; edit. Lee. ii, p. 21o. 



infuscata Lee., Ann. Lye. i, p. 173. 

 var. qiiadrinotata Say, loe. eit. 

 var. quadrignttata Lee., Proe. Acad. 18.58, p. 86. 



histrio Lefevre, Aun Ent. Soc. Fr. 1877, p. 319. 



IxvicoUis Crotch, Proe. Acad. 1873, p. 40. 

 v?iT. pumila Lee., Col. Kans. 1859, p. 23. 

 var. thoracica Mels., Proe. Aead. iii, p. 168. 

 var. aterrima Oliv., Ent. vi, p. 913, pi. 2, fig. 27. 



opacicollis Lee, Col. Kans. 1859, p. 23. 



After an accumulation of much material and its careful study, I 

 am convinced that all the above names apply to forms not specifi- 

 cally distinct. In order to give some idea of the variation the fol- 

 lowing table is presented as a guide to those who prefer to separate 

 their forms under the varietal names : 



Elytra totally black 2. 



Elytra pale or spotted 3. 



2. — Head and thorax black var. aterrimus. 



Legs entirely black S!t6-Dar. aterrimus. 



Legs entirely pale suh-var. gilvipes. 



Thorax reddish yellow var. thoracicus. 



Legs pale suh-var. thoracicus. 



Legs black suh-var. 



3. — Thorax black, elytral spots large var. quadrinotatus. 



Head rufescent suh-var. quadrinotatus. 



Head black sub var. 



Thorax yellow or slightly reddish 4. 



4 ^Elytra with black spots. 



Spots confluent in a large saddle-shaped black space; thorax smoother than 



us\ial var. sellatus. 



Spots longitudinally confluent forming a vitta on each elytron. 



var. vittatus. 

 Spots separate. 



Two on each elytron ; suture often piceous var. quadrig-uttatus. 



Three on each elytron var. sexnotatus. 



Elytra pale, without spots var. pumilus. 



