REVISION OF GENUS FURNARICOLA — CARRIKER 409 



cc. Pterotliorax wider (.315X.35), with lateral margins strongly convex. 

 d. Abdomen more slender (.48 wide); sternal portion of pleurites with 

 a prominent projection on inner side, near anterior end. 



acutifrons chocoana 



dd. Abdomen wider (.52), oval; pterothorax with lateral margins 



strongly divergent, convex; pleurites without inner projection 



(head: .47X.3!)) inexpectata 



66. Lateral spines on VIII long, slender and of equal length; more than 3 

 short setae back of spines, usually 6. 



c. Sides of head slightly convex; preantennary margin concave; pre- 

 antennary carinae normal, submarginal, but not crenulated; 1 long, 

 1 medium, and 6 short setae on VIII (head: .47X.39) . . longifrons 

 cc. Sides of head straight from middle of temples to frons; 1 long, 1 

 medium, and 6 short setae on VIII. 

 d. Preantennary carinae wider, marginal, but with inner margin 



strongly crenulated (head: .456X.38) mirandae 



dd. Preantennary carinae narrow, black, submarginal, and corrugated; 

 1 long and 6 short setae back of spines on VIII. 



acutifrons subsimilis 

 aa. Head less than .075 mm. longer than wide, but not less than .05 mm. longer 

 6. Spines on VIII with anterior one shorter than posterior; pleurites and 

 tergites strongly pigmented. 



c. 1 medium long and 4 short setae back of spines on VIII; sides of head 

 expanded laterally at clavi; lateral margins of temples flatly convex 



and with distinct, obtuse, posterolateral angles laticephala 



cc. 1 very long and 4 short setae back of spines; sides of head not ap- 

 preciably expanded at clavi; temples uniformly circular; frons wide; 



anterior plate wider than long anabacerthia 



66. Spines on VIII equal in length; may be long or short, thick or slender. 

 c. Spines on VIII very slender and long. 



d. 1 longish and 6 short setae on VIII, all pointing forward from a 

 narrow, irregular ridge; posterior half of head also more or less 



quadrilateral; frons narrow hirsuta piclrostris 



dd. 2 long and 6 short setae on VIII; head expanded laterally at 

 antennae; pleurites narrow, black; preantennary carinae with black, 



irregular inner margins hylactiphaga canae 



cc. Spines on VIII short and thick quadraticeps 



A. A. Head less than 0.5 mm. longer than wide, but more than 0.18 mm. 



a. Size large (body more than 1.80 long); spines on VIII short; 6 medium short 



setae (body length: 1.90; head, .56X. 575) lachrymosa 



aa. Size medium (body 1.60-1.75 long). 



6. Smaller, approximately 1.60 (head: .435X.39), spines on VIII very slender; 

 2 long, 1 medium, and 1 short setae; narrow, black, submarginal pre- 

 antennary carinae hylactiphaga hylactiphaga 



66. Larger, 1.70-1.75. 



c. Frons narrow (head: .51X.48), and almost triangular in shape, but 

 slightly expanded laterally at clavi; spines on VIII long and slender; 



1 long and 5 short setae back of spines chunchotambo 



cc. Frons wide, with a very wide hyaline tip; temples broadly rounded; 

 heads of blackish pleurites more or less pointed; spines on VIII short, 

 equal; 1 long and 2 short setae titicacae 



