194 PROCEEDINGS OF THE NATIONAL MUSEUM Vou. 113 
TaBLE 1.—Recorded host plants of the American species of Smicronyx north of 
Mexico—Continued. 
Subgenera 
Plants associated 
with specimens Smicronyxr Pachyphanes Pseudosmicronyr Desmoris 
(data from (data from (data from 16 (data from 
20 species) 7 species) species) 9 species) 
Leguminosae 2 2 4 1 
Cassia 1:0 (1) 
* Medicago LOR) 1:0 (2) 1:0 (1) 1:0 (1) 
Parosela (Am.) 1:0 (1) 
Prosopis 1:0 (1) 1:0 (2) 
* Trifolium 2:0 (2) 
Vachellia 2i11(2) 
Malvaceae 4 2 1 i! 
Abutilon iLSit (a) 
Callirhoe (Am.) 121) 
Gossypium 380) () 1:0 (2) 1:0 (8) 1:0 (1) 
Sphaeralcea 1:0 (2) 
Onagraceae 1 
*Oenothera 1SOK@) 
Pinaceae 1 2 
* Pinus 1:0 (1) 20) (2) 
Rhamnaceae iL 
Condalia 130°) 
Rosaceae 1 2 
Cotoneaster 1:0 (1) 
*Fragaria BO) (Ql) 
* Prunus 1 ON@) 
Ulmaceae 1 
Ulmus LO) 
that genus. The third figure, in parentheses, indicates the total 
number of separate records upon which the first two figures are based. 
The plant genera marked ‘‘(Am.)” have a strictly American distribu- 
tion. All plant genera marked with an asterisk are known to be hosts 
of some species of Cuscuta (see Gaertner, 1950). Figures for families 
indicate only the total species associated with plants of those families. 
An interpretation of this table from the standpoint of the phylo- 
genetic relationships and relative ages of the various groups of plants 
is not attempted here because so many of the host-plant records cannot 
be taken as definite evidence that the weevils actually breed in the 
plants, and because there is little or no information available on the 
host plants of a number of species of Smicronyz. 
Sourn AMERICAN spEciIES: The three known South American 
species of Smicronyx (known only from Argentina and Chile), S. 
vallium Kuschel, S. chiliensis Kuschel, and S. argentinensis Hustache, 
