30 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
PACHYSCHELUS BIGUTTATUS Waterhouse. 
Pachyschelus biguttatus WATERHOUSE, Biol. Centr.-Amer. Coleopt., vol. 3, pt. 1, 
1889, p. 153, pl. 8, fig. 22. 
This species was described from material collected by Mr. Champion 
at Bugaba at an altitude of 800 to 1,500 feet, Volcan de Chiriqui at 
an altitude of 2,000 to 4,000 feet, and David, all in the Republic 
of Panama, without designating any definite type locality. It is 
represented in the National Museum Collection by one example 
collected at Paraiso, Canal Zone, Panama, February 8, 1911, by 
K. A. Schwarz; and two other specimens collected at Gatun, Canal 
Zone, Panama, April 7, 1911, one by E. A. Schwarz and the other 
one by A. H. Jennings. 
PACHYSCHELUS STICTICUS Waterhouse. 
Pachyschelus sticticus WATERHOUSE, Biol. Centr.-Amer. Coleopt., vol. 3, pt. 1, 
1889, p. 153, pl. 8, fig. 23. 
Described from material collected by Mr. Champion at Tamahu, 
Senahu, and San Juan in Vera Paz, Guatemala. It it represented 
in the National Museum Collection by three examples collected at 
Finca Trece Aguas, Alta Vera Paz, Guatemala, at an altitude of 900 
feet, during March and April, 1906, by Messrs. Schwarz and Barber. 
PACHYSCHELUS UNDULATUS Waterhouse. 
Pachyschelus undulatus WaTEeRHOUSE, Biol. Centr.-Amer. Coleopt., vol. 3, pt. 1, 
1889, p. 151, pl. 8, fig. 18. 
This species was described from material collected by Mr. Champion 
at Bugaba and San Lorenzo, Panama, without designating any defi- 
nite type locality. Nospecimens of the species have been examined, 
and it has been placed in the key from the characters given in the 
original description. 
PACHYSCHELUS AZUREUS Waterhouse. 
Pachyschelus azureus WATERHOUSE, Biol. Centr.-Amer. Coleopt., vol. 3, pt. 1, 
1889, pp. 152-153, pl. 8, fig. 21. 
Described from material collected by Mr. Champion at Cahabon, 
Teleman, Chacoj, and Chiacam in Vera Paz, and El Tumbador at an 
altitude of 2,500 feet, all in Guatemala. It is represented in the 
National Museum Collection by one example from Livingston, Gua- 
temala, May 12, 1906, and three specimens from Finca Trece Aguas, 
Alta Vera Paz, Guatemala, at an altitude of 900 feet, collected dur- 
ing April, 1906, by Messrs. Schwarz and Barber. 
PACHYSCHELUS HYDROPOROIDES Waterhouse. 
Pachyschelus hydroporoides WATERHOUSE, Biol. Centr.-Amer. Coleopt., vol. 3. 
pt. 1, 1889, p. 140. 
This species is rather widely distributed and is a very convex and 
regularly oval species, superficially resembling some of the Hydroport. 
