1896.] SPIBBKS FBOJI THE LOWBE AMAZONS. 761 



in these situations the appearance of the webs of Tegenaria. No 

 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. ( J , 14 mm. long), Verze.ichniss der 

 Brasii. Arach. p. 24, 1880, fig. 2. Hab. llio Janeiro; Venezuela 

 and Colombia. — Of this species Bertkau remarks, " scopula nulla ; " 

 while M. srinr/uineus, M. 'iiiger, and Harmonica rufesceiu possess the 

 scopula. This species also exhibits abdominal markings, so that it 

 cannot be identical with H. rufescens. 



Diplura soricina, E. Sim. ( J , ceph. 9 mm. long), Ann. Soc. Ent. 

 Yf. p. 189 (1889). Bah. Caraga.— 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. 



Di/ilwa hicoloi; 13. Sim. ( $ , l-'j mm. long), Ann. Soc. Ent. Fr. 

 p. 215 (1889). Bitb. Caratja, Brazil. — The diagnosis " Ceplialo- 

 thorax fulvo-rufescens " — " abdomen oblongiim, atrum " — " in 

 parte secunda utrinque inordinate testaceo punctatum, subtua late 

 et crebre testaceo variegatum," will not apply to either of the 

 species under consideration. 



Diplura ffifmnogiiaiha, Bertk. ( 5 , 19 mm. long), Verz. der Brasi- 

 lianischen Arachuiden, 1880, p. 21. — "Hinterleib mehr gelbbraun, 

 Bauchseite heller " — " Grundfarbe des Cephalothorax rothbraun." 

 Certainly not one of the three here described. 



Diplura longicauda, Anss. ( 5 , carapace 10 mm. long), Verhand- 

 lungen der k. k. zool.-bob. etc. 1871, p. 179. Rah. Quito. Type 

 in coll. Univers. Vienna. — Ausserer makes no mention of any 

 blotches on the abdomen ; and the spinners are far longer in pro- 

 portion than those of H. rufescens. 



Diplura (equator ialis, Auss. ( ^ ), op. cit. 1871. — Very similar to 

 but larger than longicaucla. Hah. Cordilleras, Ecuador. Type in 

 coll. Vienna University. — Central anterior eyes one-half larger than 

 laterals (sec. Ausserer). 



Diplura rogenlmferi, Auss. ($,19 mtn. long), op. cit. 1871. 

 Hah. Brazil. — " Obere Spinnvvarzen so lang als das Abdomen." 

 " Abdomen braun, mit 6 nach hinten gebogenen, diinnen, weiss- 

 lichen Querstreifen, die sich gegen den Bauch verlieren." Central 

 anterior eyes larger than laterals (sec. Ausserer). 



Diplura cnusini, E. Sim. ( } ,22-25 Jiim. long). Act. Soc. Bordeaux, 

 1889, p. 400. Hab. Quito. — Labium with spinules at apex. Central 

 anterior eyes a little sniallor than laterals (sec. Simon). 



Genus IsoHNoxuEiiB, Ausserer, 1876. 



Type. IscJiHOthele caudata, Auss., J . 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 



