Contribution to a Knowledge of the Coleopterous Fauna 
of the Lower Rio Grande Valley in Texas and 
Tamaulipas, with Biological Notes and 
Special Reference to Geograph- 
ical Distribution. 
BY C. H. T. TOWNSEND. 
In recording the distribution of the 522 species mentioned in this 
paper., I have had access to the following lists : 
Horn. — Coleoptera of Baja California, 1894. 
Riley. — Coleoptera of Death Valley Expedition, 1893. 
Wickham. — Coleoptera of Northern New Mexico and Arizona, 1896; Coleoptera 
of Southern Shore of Lake Superior, 1896; Coleoptera of Bahama Expedition, 
1895; Coleoptera of the Lower Rio Grande, 1897. 
Cockerell. — Coleoptera of Custer County, Colorado, 1893; Notes on Coleoptera 
of Jamaica in Journal Institute of Jamaica. 
Leconte. — Coleoptera of Kansas and Eastern New Mexico; Coleoptera of Alpine 
Regions of the Rocky Mountains, 1878-1880. 
Champion. — Heteromerous Coleoptera of St. Vincent and Grenada. 
Gahan. — Longicorn Coleoptera of the West Indies. 
Blaisdell and Dunn. — Lists of California Coleoptera in Zoe. 
Smith. — Lachnosternas of North America ; Catalogue of Insects of New Jersey. 
Schwarz.— Semitropical Texas. 
Schaupp. — Synopsis of the Cicindelidae. 
Linell. — Descriptions of New Species of North American Coleoptera of Fami- 
lies Cerambycidae, Scarabaeidae and Chrysomelidae. Several papers in Proc. U. 
S. N. Mus. 
Fall. — Revision of the Species of Apion ; Synopsis of the Species of Acmaeo- 
dera. 
Hamilton.— The Lamiinae of North America. 
Casey. — Coleopterological Notices. 
Leconte and Horn. — Rhynchophora of North America. 
Townsend. — Published Lists of Coleoptera of Southern Louisiana, Southern 
Michigan, New Mexico and Arizona, and Jamaica. 
I have also had the benefit of my own personal observations and manu- 
script notes on collecting in Mexico, in the State of Tamaulipas, Vera 
Cruz and Tabasco, where I have made extensive collections of coleoptera. 
Of these the Vera. Cruz material is in the collection of Mr. F. C. Bow- 
ditch, and the Tabasco material is in that of Capt. Thomas L. Casey. 
In addition to the above, Mr. E. A. Schwarz, of the Department of 
