Ill 



Smith ond Pritchard: Odonata 



\ I 



•', 9TM I-V-RIOGE 



%, f y" , / 



% APPENDAGE 



LATERAL ANAL 

 APPENDAGE 



INFERIOR ANAL 

 APPENDAGE 



<? APPE.NDAGE 



.SUPERIOR ANAL 

 APPENDAGE 



<f APPENDAGE 



PROTHORACIC 

 COXA 



ME50THORACIC 

 CO/A 



I 



Fig. 4:12. Anisopterous naiads. a,b, Dromogomphus; c,d,k, Gomphus; e, Aphylla; f,g, Basi- 

 aeschna, h, Nasiaeschna; i, Tachopteryx; j, Progomphus; a-i, caudal segments of abdomen; j,k, 

 ventral view of thorax (Wright and Peterson, 1944). 



long as 6 following together (fig. 4:14e); mentum with a 



deep, open, median cleft (fig. 4:14d) AGRIONLDAE 



7. Basal half of labium greatly narrowed like a stalk; 



lateral lobes wi£h distal margin deeply cut by 2 or 3 



incisions; median cleft present, closed (fig. 4:146) 



LESTEDAE 



— Basal half of labium not greatly narrowed; lateral lobes 



not deeply cleft; median cleft lacking (fig. 4:14c,/) 



COENAGRIONLDAE 



ANISOPTERA 



Family PETALURIDAE 



The petalurids comprise the most generalized group 

 of living Anisoptera. A single species, Tachopteryx 

 thoreyi Selys, occurs in the eastern United States, 

 whereas the genus Tanypteryx is found in western 

 North America and in Japan. The sluggish naiads 



