BIBLIOGRAPHY. 



215 



SCHWARZ, E. A.— Continued. 



An account of the annoyance caused to 

 luiniau beiugs and animals by Sippelatea fla- 

 vipcs, n.pusio, and IJ.jdebcjvs in the southern 

 United States, with notes on geograiihical dis- 

 tribution, habits, and probable life history. 



An imported library pest. 



Insect Life, vii, No. 5, July, 1895, pp. 

 396-398, 1 tig. 

 A consideration of the habits of Nicohium 

 hirtum, a Ptiuid beetle which has been im- 

 ported into the United States and has been 

 found to damage books in the southern states. 



SIMPSON, Charles Torrey. Pleuro- 

 cera subuJare in water mains. 



Nautilus, IX, No. 4, Aug., 1895, pp. 37, 38. 

 An account of rieurocera suhulare, Lea, a 

 common moUusk of the Mississippi Basin, 

 ■which was taken by Mr. Charles T. Lewis, of 

 the Hannibal Water Company, Hannibal, Mo., 

 from the water mains of that city, where in 

 many places the dead shells accumulated so as 

 to completely clog the pipes and faucets. 

 Specimens were donated to the National 

 Museum. 



Description of four new species of 



Unios from the Staked Plains of Texas. 



Proc. V. S. Nat. Mus., xvni, No, 1072, May 

 19, 1896, pp. 381-385, flgs. 1-5. 

 This is a description of Unios believed to be 

 Triassic. These four forms exhibit a remark- 

 able diversity in form, sculpture, hinge, and 

 other characters, and indicate that the genus 

 Tlnio had long been established at the time 

 these species were living. Specimens from the 

 type lot and casts from types are in the National 

 Museum collection. 



The classification and geographi- 

 cal distribution of the pearly fresh 

 water mussels. 



Proc. TJ. S. NM- Mus., svin, No. 1068, May 

 19, 1896, pp. 295-343, pi. ix. 



This paper briefly reviews the history of the 

 classification of the Naiades, and proposes a 

 new one in part, based on all the characters, 

 but more especially on those of the hinge and 

 embryos. Those genera which have taxodont 

 teeth or vestiges of them, and i)ass through a 

 larval stage called "lasidium," are placed in 

 the family Mutelidae, while those having schizo- 

 dont teeth or their vestiges, and which pass 

 through a glochidinm stage, are classified 

 under the Unionidie, and the families and 

 genera are defined. 



It is held that the Naiades are distributed in 

 eight regions or provinces, viz: Ethiopian, 

 Palearctic, Oriental, and Australian in the Old 

 World; a part of the Palearctic region, the 

 Mississippi, Atlantic, Central American, and 

 Neotropical provinces in the New World. 



SIMPSON, Charles Torrey— Cont'd. 



On the Mississippi Valley Unionidte 

 found in the St. Lawrence and Atlantic 

 drainage areas. 



Am. Naturalist, xxx. No. 353, May 20, 

 1896, pp. 379-384. 



This paper shows that the extralimital Mis- 

 sissippi Valley Unionida) found in the St. Law- 

 rence Basin are iisually dwarfed and dull 

 colored, and the claim is made that many of the 

 so-c.illed species of the latter region are merely 

 depauperate varieties of well-known Missis- 

 sippi Valley forms which have become changed 

 since they have occupied the waters they now 

 inhabit. The theory is advanced that these 

 species migrated northward at the close of the 

 glacial epoch, by way of old streams that flowed 

 from lakes in the north into the Mississippi 

 Valley at that time, as the ice cap to the north 

 and northeast prevented drainage to the north 

 and east. 



SPRAGUE, U. A. The Dwarf Thrush in 

 Colorado. 



Auk, xni. No. 1 , Jan ., 1896, p. 85. 

 The species is recorded from Colorado, based 

 on a specimen shot near Boulder. 



STANTON, Timothy William. Contri- 

 butions to the Cretaceous Paleontology 

 of the Pacific Coast. The fauna of the 

 Knoxville beds. 



Pidl. U. S. Oeol. Sun., No. 133, 1895 (Feb. 

 3, 1896), pp. 1-132, pis. 1-20. 

 This monograph is an extended treatise on 

 the fossil animals found in the Knoxville beds, 

 the local development of this horizon along the 

 Pacific Coast, and the relationship of this 

 fauna with other faunas. It is based almost 

 entirely upon material gathered by the U. S. 

 Geological Survey, andnow in the U. S. National 

 Museum collection. 



STEJNEGER, Leonhard. Aleut Bai- 

 darkas in Kamchatka. 



Science (New series), n, July 19, 1895, pp. 



62, 63. 



A correction of certain statements by Dr. 



Guillemard in his "Cruise of the Marchesa," 



concerning some baidarkas alleged to be of 



Kurile origin. 



The poisouous snakes of North 



America. 



Hep. Smithsonian Inst. (77. S. Nat. 

 Mus.), 1893 (1895), pp. 337-487, pis. 1-19, 

 flgs. 1-70. 

 A popular scientific treatise on our poison- 

 ous snakes, with general reference to their 

 anatomy, physiology, morphology, and habits. 



Description of a new genus and 



species of Blind Tailed Batrachian from 

 the subterranean waters of Texas. 



Proc. r. S. Xat. Mus., xvin. No. 1088. Apr. 

 15, 1896, pp. [l]-[3]. Advance edition. 



