212 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Cephalic ornamentation not in form of collar, but of epaulets or alate 



appendages; cervical papillae not as above 9. 



9. Cephalic ornamentation consisting of 4 delicate membranous alae directed 



posteriorly Sciadiocara, p. 260. 



Cephalic ornamentation consisting of 2 crescent-shaped epaulets 10. 



10. Free edge of epaulets markedly dentate; precervical papillae enormous, 

 tricuspid; no lateral alae on body, but in their place 2 double rows of 



posteriorly directed hooks Seuratia, p. 262. 



Free edge of epaulets not dentate; precervical papillae small, simple, in- 

 serted in the 2 lateral alae of the body ; no rows of hooks on body. 



Rusguniella, p. 258. 



Genus ACUARIA Bremser, 1811, sensu lato 



Synonyms. — Spiroptera Rudolphi, 1819, part; Anthuris Rudolphi, 

 1819; Dispharagus Dujardin, 1845. 



Generic diagnosis. — Acuariinae (p. 211) : Anterior extremity with- 

 out vesicular swelling, but bearing 4 cutaneous cordons, salient or 

 depressed, extending at times directly posteriorly, more often folded 

 anteriorly, and sometimes uniting in pairs on the lateral surfaces. 



Parasitic in esophagus, glandular stomach or gizzard of birds. 



Type-species. — Acuaria anthuris (Rudolphi, 1819) Railliet, Henry, 

 and Sisoff, 1912. 



As used in this paper, Acuaria sensu lato is equivalent to its gen- 

 eric rank as accorded by Railliet, Henry, and Sisoff; the subgenus 

 Acuaria of these writers is given generic rank in this paper and 

 regarded as Acuaria sensu stricto. Only those forms which can 

 not be definitely referred to the subgenera of Railliet, Henry, and 

 Sisoff, here accorded generic status, are left in Acuaria sensu lato 

 and covered in the following key. Other species should be traced 

 through the key to genera of Acuariinae. 



K.KY TO SPECIES OF ACUARIA SEXSU LATO 



1. Cordons recurrent Acuaria quadriloba, p. 215. 



Cordons not recurrent 2. 



2. Only larva known ; genitalia unknown ; cordons 145/* long. 



Acuaria tarentolae, p. 216. 



Adults known ; cordons, where known, more than 145m long ; males 



unknown 3. 



3. Cordons extend beyond esophagus ; female 21 mm. long. 



Acuaria mamillaris, p. 213. 



Cordons do not extend beyond esophagus, or, if they do, then female not 



over 12.73 mm. long 4. 



4. Cordons extend beyond esophagus ; female 8.84 to 12.73 mm. long. 



Acuaria ptilopachydis, p. 214. 

 Cordons do not extend beyond esophagus 5. 



5. Lips unequal ; cordons end 330/x from head ; total length of esophagus less 



than 1/10 of body length Acuaria muscicapae, p. 214. 



Lips apparently equal ; cordons end 800m from head ; total length of esoph- 

 agus approximately 2/5 of body length Acuaria macrolaima, p. 213. 



