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Show 1896.] SPIDERS FROM THE LOWER AMAZONS. 761 in these situations the appearance of the webs of Tegenarla. males were met with, and the greater part of the specimens obtained were immature. The following species of this group have been described from South America, but none of them appear to be identical with those which I have met with on the Amazons :- Thaleroihele fasciata, Bertk. ( 5 , 14 m m . long), Verzeichniss Brasil. Arach. p. 24, 1880, fig. 2. Hab. Bio Janeiro; Venezuela and Colombia.-Of this species Bertkau remarks, " scopula nulla ; " while M. sanguineus, M. niger, and Harmonica rufescens possess scopula. This species also exhibits abdominal markings, so that it cannot be identical with B. rufescens. Biplura soriclna, E. Sim. ( 2 > ceph. 9 mm. long), Ann. Soc. Ent. Fr. p. 189 (1889). Hab. Caraca.-M. Simon's note, "Abdomen fuscum, crebre testaceo punctatum, in medio maculis fulvis uni-seriatis," proves that his species is not identical with either of the above three species. Biplura bicolor, E. Sim. ( $ , 15 mm. long), Ann. Soc. Ent. Fr. p. 215 (1889). Hab. Caraca, Brazil.-The diagnosis " Cephalothorax fulvo-rufescens " - " abdomen oblongum, atrum " - " in parte secunda utrinque inordinate testaceo punctatum, subtus late et crebre testaceo variegatum," will not apply to either of the species under consideration. Biplura gymnognatha, Bertk. ( $ , 19 mm. long), Verz. der Brasi-lianischen Arachniden, 1880, p. 21.-•"Hinterleib mehr gelbbraun, Bauchseite heller " - " Grundfarbe des Cephalothorax rothbraun." Certainly not one of the three here described. Biplura longicauda, Auss. ( $ , carapace 10 mm. long), Verhandlungen der k. k. zool.-bot. etc. 1871, p. 179. Hab. Quito. Type in coll. Univers. Vienna.-Ausserer makes no mention of any blotches on the abdomen ; and the spinners are far longer in proportion than those of H. rufescens. Biplura cequatorialis, Auss. ( 2 )? °p. cit. 1871.-Very similar but larger than longicauda. Hab. Cordilleras, Ecuador. Type in coll. Vienna University.-Central anterior eyes one-half larger than laterals (sec. Ausserer). Biplura rogenhoferi, Auss. (2, 19 mm. long), op. cit. 1871. Hab. Brazil.-" Obere Spinnwarzen so lang als das Abdomen." " Abdomen braun, mit 6 nach hinten gebogenen, diinnen, weiss-lichen Querstreifen, die sich gegen den Bauch verheren." Central anterior eyes larger than laterals (sec. Ausserer). Biplura couslnl, E. Sim. ( $ ,22-25 m m. long), Act. Soc. Bordeaux, 1889, p. 400. Hab. Quito.-Labium with spiuules at apex. Central anterior eyes a little smaller than laterals (sec. Simon). G-enus ISCHNOTHELE, Ausserer, 1876. Type. Ischnothele caudata, Auss., $ . Hab. Yucatan, Mexico. Verhandl. der k. k. zool.-bot. Gesell. Wien, 1876, p. 163. Type specimen in coll. Brit. Mus. Nat. Hist. PROC. ZOOL. Soc-1896, No. XLIX. 49 |
