TRIMEROTROPIS. 171 



6. Tr. gracilis, Th. — OEdip. gracilis, Thom. Geol. Surv. of Territ. 1871, 



461; Acrid. 121. 



Gracilis, compressa, pallide grisea, nigro-punctulata.— Caput angustum, prominu- 

 lum. Costa facialis lola elsi ad frontem sulcata, infra ocellum ad frontemque coarctata. 



— Pronolum angustum, postice quam caput haud latius; in prozona compresso- 

 cristulalum, crista bilobata; metazona pentagonalis, punctulata, valde carinata, carina 

 antice cristulata; processus reclangulus. Lobi laterales paralleli. — Elylra pallida, 

 sparse nigro-punctata, in dimidio apicali hic illic in venis punctatis. — A!se dimidio 

 basali et margine postico subtilissime flavescente, dimidio apicali et campo antico fere 

 toto, hyalinis, venis nigris vel nebulosis ; apice punctis nigris aliquot, margine antico 

 ullra medium griseo: venulis transversis arere medise et ulnaris ante medium crasse 

 nigris, reticulatione campi postici ultra discum flavum partim nigra. — Variat alis 

 in dimidio apicali nebulosis, ad discum flavicantem spurcalis, nec non vilta humerali 

 obscura.— Long. Q 27, tf 21 ; El. Q 26, tf 22 mill. — Amer. boreal. ; Colorado, 

 Idaho. (L. Bruner.) 



7. Tr. iisilliriipeimis. Burm. — OEdip. pallidipennis, Burm. Handb. 11, 641, 3; 



Thomas, Acrid. 218. — OEd. straminea, Erichs. ap. Schomburg, Faun. et Flor. 

 Brit. Guyan. 582. 



Tr. cinche simillima at minor. Elytra valde fusco-fasciata. Costa facialis plus minus 

 sinuala. nonnunquam angusta. Tibioe post. sanguinese. — Variat fascia fusca alarum 



— a. intns abbreviata. — b. valde angusta. — Long. Q 23-27; tf 18-21; 

 El. 9 24-30, (j 1 19-22 mill. — America central et merid. ; Mexico altior. In 

 montibus et silvis pineis prope Tesuitlan in speciem incididi, etiam in regionibus cala- 

 dioribus Oaxacae,Cordoba3 reperitur ; in ripis lacus Meztitlani marem cepi elylris brevio- 

 ribus, femoribusque intus rubris. — Guyana. — Venezuela. — Ager argentinus 

 (Giinlher). — Patagonia sept. (G. Claraz.). 



Verisimiliter vanetas minor Tr. cinctce. 



H. Tr. Cincta, Th. — OEdip. cincta, Thomas, Proc. Acad. Philad. 1870, 80; 

 Geol. Surv. ofTerrit. 1870, 275; Acrid. 122. — ? Tr. vinculata, Scudd. ap. 

 2 d Bep. Entomol, Commiss. 1880, p. 27. 



Tr. citrinw statura, formis picturaque simillima; costa faciali infere minus dila- 



