Cremastocheilus chapini

One of about forty-five species of myrmecophilous Cremastocheilus. The host ant is unknown.

Identification
This species appears to be most closely associated with C. nitens LeConte but differs from that species by having the anterior angles of the pronotum much less constricted, the side margins more obtusely bent, the front angles not pointed, and the anterior sinuses deeper and quadrate. C. Chapini has the posterior margin of the mentum evenly rounded, whereas, in nitens it is distinctly produced and pointed. The elytral punctures in chapini are larger and more closely placed than in nitens.

Distribution
Arizona

Habitat
Common host is unknown.

Nomenclature
Holotype female in the collection of the United States National Museum, collected at Yuma, Arizona, August 1902 by H.H. Brown and loaned to Cazier for study by Dr. E.A. Chapin after whom the species is gratefully named.