. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 600 Bulletin Museum of Comparative Zoology, Vol. 150, No. 8. Map 14. Distribution of Micrathena pungens. vicencio, 2 (AMNH); 45 km W of Villavi- cencio (AMNH). Boyacd-Santander. Rio Suarez, 800-1,000 m (AMNH). Cundi- namarca. Bogota, 9 (NMW). Caquetd. Rio Orteguaza, 200 m (AMNH). ECUADOR: Prov. Napo. Tarapuy, 9 (MECN); Napo headwaters, Rio Arajuno, 1,000 m (AMNH). Morona-Santiago. Wakani, Chiguaza, 9 (MCZ). PERU: Dept. Loreto. Iquitos (MCZ); Rio Bombo, Alto Tapiche (AMNH). Amazonas. Montenegro, Bagua (AMNH). San Marti
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 600 Bulletin Museum of Comparative Zoology, Vol. 150, No. 8. Map 14. Distribution of Micrathena pungens. vicencio, 2 (AMNH); 45 km W of Villavi- cencio (AMNH). Boyacd-Santander. Rio Suarez, 800-1,000 m (AMNH). Cundi- namarca. Bogota, 9 (NMW). Caquetd. Rio Orteguaza, 200 m (AMNH). ECUADOR: Prov. Napo. Tarapuy, 9 (MECN); Napo headwaters, Rio Arajuno, 1,000 m (AMNH). Morona-Santiago. Wakani, Chiguaza, 9 (MCZ). PERU: Dept. Loreto. Iquitos (MCZ); Rio Bombo, Alto Tapiche (AMNH). Amazonas. Montenegro, Bagua (AMNH). San Martin. 30 km SE of Mo- yobamba, 20 km NE of Moyobamba (AMNH); Rio Alto Marafion, Rio Campo Nueva (AMNH). Hudnuco. Divisoria (?) (AMNH). Pasco. Puerto Bermudez, Rio Pichis (CUC). BRAZIL: Est. Pard. Belem (MCZ); 50 km E of Caninde, 9 (AMNH); Cachoeira, 59 (IBSP); Rio Gurupi, 29 (MZSP). Amazonas. Taracua, 9 (NRS); Rio Negro, Sao Gabriel, 29 (NRS); Manaus, 9, $ (MEG); Reserve Ducke, NNE of Ma- naus, 6 (AMNH). Rondonia. Porto Velho, 9 (MCZ); Abuna, 9 (MCZ); Vila Murtinho, 9 (MCZ). Maranhdo. Chapade dos Gui- maraes, 9 (AMNH). Mato Grosso. Ari- puana, 9 (MCZ); 260 km N of Xavantina, 1969, juv. 9, S (Xavantino- Cachimbo Exped., MCZ). BOLIVIA: Dept. Beni. Vasa Diez, Cachuela Espe- ranza. April 1922, 9 (J. H. Williamson, MCZ). La Paz. Coroico, 9 (E. Reimoser, MCZ). Chaetacis Simon Chaetacis Simon, 1895: 863. Type species Acrosoma affinis C. L. Koch (=C. aureola) by original des- ignation. Diagnosis. Chaetacis species differ from other American Araneidae except Mi- crathena and Gasteracantha by having a sclerotized ring around the spinnerets. It differs from Micrathena and Gasteracan- tha by having swellings with tubercles or a prominent spine on each side of the head, behind the eyes (Figs. 792, 793, 803, 804, Table 3). Description. Females of all species are to mm in total length, males be- tween and mm. All species have the carapace orange to orange-brown, the po
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