44 IOWA STUDIES IN NATURAL HISTORY 
Superfamily POLYDESMOIDEA 
Family Strongylosomide 
Orthomorpha coarctata (Saussure) 
Polydesmus coarctatus Saussure, Mem. Myr. Mex., (1860), p. 39, f. 18. 
Orthomorpha coarctata Pocock, Ann. Mus. civ. Genoa, ser. 2, XIV, (1895), 
p. 809. 
Orthomorpha coarctata Chamberlin, Bull. Mus. Comp. Zool., LXII, (1918), 
p. 245. 
A number of specimens of this species were taken on Bar- 
bados. Although doubtless originating in the East Indian: region, 
the species is now tropicopolitan. It is one of the forms most 
commonly transported by ship along with plants from tropical 
countries and is often thus intercepted at quarantine in ports 
of the United States. It is now well established throughout the 
West Indies, in Central America, and in other portions of the 
warmer section of the Western Hemisphere. 
