ARZOSCHIZUS.—DACODERUS. 51 
Group STENOSIDES. 
A few genera of this group are found in Chili, and one in North America; the 
remainder in the Old World, many species occurring in the south of Europe. 
ARZZOSCHIZUS. 
Areoschizus, Leconte, Ann. Lyc. New York, v. p. 188; Horn, Revis. Ten. N. A. Trans. Am. Phil. 
Soc. xiv. p. 274; Lec. & Horn, Class. Col. N. A. p. 866 (1883). 
This genus, recorded from California and New Mexico, has lately been received from 
the north of Mexico just within our boundary; the four recorded species are stated to 
occur beneath stones in hot, dry, desert regions. 
1. Arzoschizus costipennis. 
Areoschizus costipennis, Lec. Ann. Lyc. New York, v. p. 188*; Horn, Revis. Ten. N. A. Trans. Am. 
Phil. Soe. xiv. p. 274°. 
Hab. Nort America! ?.—Mexico, Northern Sonora (Morrison). 
Group DACODERIDES. 
This group consists of a genus peculiar to the Southern United States and to the 
West Indies. 
DACODERUS. 
Dacoderus, Leconte, Proc. Acad. Phil. 1858, p. 74; Class. Col. N. A. 1862, p. 216; Horn, Revis. 
Ten. N. A. p. 275 (1870); Lec. & Horn, Class. Col. N. A. p. 365 (1883). 
Two species only are known of this genus—one found in North America, from 
California to the Gila river, and just within our limits; the other in the island of 
Santo Domingo. 
These insects greatly resemble Rhyssodes; they are stated to occur beneath stones, or 
under bark, in very dry places, and to feign death very persistently. 
1. Dacoderus striaticeps. 
Dacoderus striaticeps, Lec. Proc. Acad. Phil. 1858, p. 74°; Thoms. Arcana, i. t. 12. f.6; Horn, 
Revis. Ten. N. A. p. 2767; Lec. & Horn, Class. Col. N. A. p. 365°. 
Hab. Nortu America, Fort Yuma}, Vallecito in California to Fort Grant in Arizona?, 
junction of the Colorado and Gila rivers a, 
This species is found just on our northern boundary. 
Subfam. ASIDIN. 
This subfamily, as understood here, will include those species placed in it by Horn 
and Leconte, Nyctelia and allies so numerous in South America, and others. Nearly 
HH 2 
