REPORT OF ASSISTANT SECRETARY. 51 



No. 86E Onthegenera Labnchthys and Pneudolairus. By Theodore Gill. Pp. 395-404. 

 No.862. Description of a new scincoid lizard from East Africa. I'.y Leonhard 



Stejneger. 1*. 105. 

 No.863. Description of a new species of lizard, from the Island San I'c<lr<> Martir, 



Gulf of California. By Leonhard Stejneger. P.407. 

 No. 864. Description of a new North American lizard of the genus Sauromalus. By 



Leonhard Stejneger. Pp. 109-411. 

 No. 865. Notes on and a list of birds and eggs collected in Antic America. 1861-1860. 



I'.y R. MacFarlane. Pp. 413-446. 

 No. 866. On the characters of some paleozoic fishes. By E. D. Cope. Pp. 447-463. 

 No. 807. Description of a new species of whip-poor-will from Costa Rica. By Rober! 



Ridgway. Pp. 465, 466. 

 No.868. Notes on some birds from the interior of Honduras. By Robert Ridgway. 



Pp. 467-471. 

 No.869. Notes on some Costa Rican birds. By Robert Ridgway. Pp. 473-478. 

 No. 870. Note on Pachyrliampus albinucha Burmeister. By Roberl Ridgway. Pp. 



479, 480. 

 No. 871. Description of two supposed new forms of Thamnophilus. By Robert Ridg- 

 way. P. 481. 

 No. 872. Description of a new sharp-tailed sparrow from California. By Robert 



Ridgway. Pp. 483, 484. 

 No. 873. Notes on Sceloporus variabilis and its geographical distribution in the United 



States. By Leonhard Stejneger. Pp. 485-488. 

 No. 874. Notes on the .Japanese birds contained in the Science College. Imperial 



University, Tokyo, Japan. By Leonhard stejneger. Pp. 489-498. 

 No. 875. Notes on the cubital coverts in the birds of paradise and bower birds. By 



Leonhard Stejneger. Pp.499, 500. 

 No. 876. Notes on some North American snakes. By Leonhard Stejneger. Pp. 501-505. 

 No. 877. Note on the genus Sittasomus of Swainson. By Robert Ridgway. Pp.507- 



510. 

 No. 878. On the snakes of the Californian genus Lichanura. By Leonhard Stejneger- 



Pp. 511-515. 

 No. 879. Notes on Costa Rican birds. By George K.Cherrie. Pp. 517-537. 

 No.880. Scientific results of explorations by the U. S. Fish Commission Steamer 



A Ibatross. No. xxn. Descriptions of thirty -four new species of fishes col 



lected in 1888 and 1889, principally among the Santa Barbara Islands 



and in the Gulf of California. By Charles H. Gilbert. Pp. 539-566. 

 No. 881. The biology of the hymenopterous insects of the family Chaleididm. By 



L. O. Howard. Pp. 567-588. 

 No. 882. A critical review of the characters and variations of the snakes of North 



America. By E. D. Cope. Pp. 589-694. 

 No.883. Note on the genus Hiatula of Lacepede or Tautoga of Mitchill. By Theo- 

 dore Gill. P. 695. 

 No. ssl. Note on the genus Chonerhinus or Xenopterw. By Theodore Gill. Pp. 097- 



699. 

 No.885. On the genus Gnathanacanthus of Bleeker. By Theodore Gill. Pp. 701-704. 

 No. 886. Notes on the Tetraodontoidea. By Theodore Gill. Pp. 705-720. 



Of Volume xv the following papers were issued separately during 

 tlic year: 



No.887. Preliminary descriptions of thirty-86ven new species ofhermil crabs of the 

 genus En pag urns in the U. S. National Museum. By James 15. Benedict. 

 Pp. 1-26. 



No. 888. Description of two apparently new flycatchers from Costa Rica. By Georgia 

 K. Cherrie. Pp. 27, 28 



