28 [August 



It would seem, too. as if the relations of these insects to the sur- 

 rounding world, the levers by means of which Derivatists suppose Nat- 

 ural Selection to move the World of Life, were more constant than 

 usual in species of this genus, confined as it is (and as no other genus 

 of Diurnal Lepidoptera is) to alpine and arctic regions, and especially 

 if Lichens a'-e the food-plant of all of them, as I believe is the case 

 with C. semidea. 



Boston Society of Natural History^ May 5, 1865. 



ON SOME NEW SPECIES OF PSELAPHIDai. 

 BY EMIL BRENDEL, M. D. 



{Communicated July l(lth, 1865.) 



Entirely new forms of this interesting family of Coleoptera are daily 

 discovered, and it seems necessary to settle the question, at least with 

 some of them, in order not to be behind time. 



By the kindness and liberal assistance of the heroes of American 

 Entomology, Dr. John L. LeConte of Philadelphia, and Henry Ulke of 

 Washington, D. C, I was enabled to acquaint myself with forms till 

 lately unknown, besides those I collected in different parts of the \}. S. 

 Encouraged by so distinguished Entomologists, I undertook to describe 

 the following forms, commencing with the only genus of Europe till 

 now not known to be represented on this Continent. 



BYTHINUS, Leach. 

 Antennse distantes in fossa ante oculos insertfe 11-artieulatae. 

 Palpi maxillares 4-articulati, articulo primo filiformi secundo cla- 

 vato, tertio globuloso, quarto magno securiformi. 

 Abdomen marginatum. 

 Thorace subglobosus, basi angustatus. 

 Tarsi monodactyli. 



1. B. zonatas. — Fusco-rufus, pubescens subtilissime punctulatus, capite bifo- 

 veato, fronte emarginato, thorace globoso, truncato, unifoveato. elytris con- 

 vexis, abdomine brevi marginato. Long L2 mill. metr. 



Bythino macropalpi Europae simillima. Fusco-rufus, brevissime pu- 

 bescens. Caput laeve, vertice stigmatibus binis leviter impressis, fronte 

 sulcj transversali iuconspicuo leviter inipressa. uculis paulo prominulis. 

 Antennae breviusculae, in fovea sub frontis margine insertte, pubesceutes, 

 articulo primo sequenti majore, hoc iterum majore tertio, o — 9 lequalibus. 

 rotundatis, lOmo transverso obconico. ultimo maxinio, inflato, ovato. 

 Palpi maxillari minutje. articulo primo et secundo filiform bus, tertio 



