510 



Trans. Acad. Sci. of St. Louis. 



INDEX TO GENERA. 



(SYNONYMS IN PARENTHESIS.) 



Abilgaardia (474) 



Abutilon 402 



Acacia 418-9 (420) 



Acalypha 463, 482 



Acanthospermum 433 



Acer Ixxiv 



Achras 438 



Achyranthus 456 



Acisanthera 422 



Acmaeops 167 



Acroglossa 176, 178 



Acrostichum 481 



Actinocrinus 366 



Acupurpura (371) 



Adelia 463 



Adiantum 479 



Aeschynomene 412 



Aesculus 159-161 



Afer (390) 



Agapostemon 174-6, 179, 325-8 



Agaricocrinus 366 



Agati (411) 



Agave li 



Ageratum 432 



Agkistrodon 50O 



Alasmodonta (58) 59, 60 



Alcidamea 169,349 



Alibertia 429 



Alipurpura (383) 



Alisma 240 



AUagecrinus 363 



Allograpta 158, 175, 177 



Alternanthera 456 



Alysicarpus 413 



Amblystoma 502 



Ambocoelia 363 



Ambrosia 239 



Ammannia 422 



Ammobates 352 



Ammophila 174, 175, 177-9 



Amphiolanthus (449) 



Amphipeltus 365 



Amphoracrinus 366 



Amplexus 366 



Anacardium 410 



Anacrabro 168 



Anastraphia 435 



Andrena 154, 168, 172, 175, 177-8 



(329) 330-6 

 Andromycia 472 

 Andronicus 349 

 Andropogou 231, 236-6, 475 

 Anemia 481 



Anemone 153 (154) 240 

 Angelonia 449 

 Anguria 426 

 Anoda 401 

 Anodon (60) 



Anodonta (59, 60) 61 (62) 63, 64 

 Anona 398 

 Anthacanthus 452 

 Anthephora 475 

 Anthidium 162 

 Anthocomus 167 

 Anthophora 160, 162, 169 

 Anthrax 175, 177-8 

 Anthrenus 167, 171 

 Antigonon 458 

 Apathus (356) 

 Apis 154, 156, 159, 162, 175-6, 178 



(326) (329) (330) (356) 

 Arachis (412) 

 Archaeocidaris 366 

 Argeraone 399 

 Argyramoeba 175 

 Argythamnia 462 

 Aristida 232 

 Aristolochia 459 

 Arnica Ixvi 

 Aruncus (166) 



