Number 147 April 26. 1924 OCCASIONAL PAPERS OF THE MUSEUM OF ZOOLOGY UNIVERSITY OF MICHIGAN Ann Arbor, Michigan Published by the Uxm:RSiTY A NEW LEPOSOMA FROM PANAMA By a. G. Ruthvex and Helen T. Gaige A number of specimens of a Leposoma which seems to differ widely from the hitherto known species, were collected by the Bryant "Walker Expedition to Panama (1923). We take great pleasure in dedicating this form to Dr. John Grant South, United States Minister to the Republic of Panama. Leposoma southi, new species Diagnosis : Head scales very rough, longitudinally striated ; two frontonasals ; praefrontals half the length of the frontal and smaller than the frontoparietals ; three pairs of chin shields, the two anterior pairs in contact ; scales from the eye to shoulder very rough (smoother in dispar and taeniaia)} Type Specimen : Cat. Xo. 48065, Museum of Zoology, I'ni-versity of Michigan. Progreso (90 ft. elev.), Chiriqui Prov-ince, Panama; April 19, 1923; H. T. Gaige, collector. Description of Type Speciynoi: Form of head and body as in L. dispar; head scales very rugose, strongly striated; two frontonasals, each slightly concave behind; a pair of prae-1 We are indebted to Dr. G. K. Noble, American Museum, for the opportunity of examining a paratype of L. taeniata.