49 



either of the species previously mentioned. This insect has been 

 found attacking white prickly poppy (Argemone alba) and tumble- 

 weed (Amaranthus graicizans) in the spring, and probably breeds on 

 Prionopsis ciliata Nutt and the broad-leaved gum plant (Grindelia 

 squarrosa). 



In general the food habits of any species are among its distinctive, 

 specific characters, and as the structural differences are easily over- 

 looked and difficult of appreciation by anyone unacquainted with the 

 careful study of insects, a rather full, though by no means complete, 

 list is here given of the species which have been reported to the 

 Division of Entomology as having been confused with the boll weevil. ra 

 Many of the most common species will be found figured among the 

 illustrations. The scientific names of the insects are given because 

 they are definite and refer positively to a single species, whereas the 

 common names are used so loosely that the same name may be applied 

 to a number of species having possibly similar habits. The boll weevil 

 is included in this list, and figures of the adult are given in the plates 

 to facilitate comparison. In many cases no common name has yet 

 been given to the species. Seven of the species mentioned attack 

 living cotton and five species are found feeding only in decaying bolls. 

 The occurrence of the remainder upon cotton is merely incidental. 

 Insects often mistaken for the boll iveevil. 



Scientific name. 



Common name. 



U sual food plant . 



Plate 

 figure. 



AVEETILS. 



Mexican cotton boll weevil 



Plum gouger . 

 Acorn weevil . 



Cowpea-pod weevil 



Anthonomus grand is Boh 



Anthonomus albopilosusDietz. 



Anthonomus prunicida . 



Balaninus uniformis auct 



Centrinus penicellus Hbst 



Centrinus picumnus Hbst 



Chalcodermus ceneus Bob 



Desm oris scapalis Lee ! 



Desmcris constrictus Say 



Dorytomus mucidus Lee 



Lixus Icesicollis Lee - Blood-weed weevil 



Coccotorus scutellaris Apple curculio 



Bar is striata Say Striped Baris 



Baris transversa Say. Transverse Baris.. 



Horned stem borer. 



Coffee-bean weevil . 



Cotton squares and bolls. 



XIV, 52, 53. 



XIV,57. 



xrv,55. 



XV, 61. 



Plums 



Acorns 



Beetle in flowers 



do 



Cowpeapods j XV, 63,64. 



Broad-leaved gum plant . XIV, 58. 



Anthribus cornutus Say 



Arozcerus fasciculatus DeGr ... 



Imbricated snout beetle 



Willow 



Ragweed (Ambrosia spp) . : XIV, 54. 



Apple... XrV, 56. 



Stems of ragweed 



Roots of cocklebur XV, 59, 60. 



Cotton stems ' 



Coffee beans and old cot- XV, 62. 



ton bolls. 

 Omnivorous XVI, 69. 



Mexican rose beetle. 



Epicozrus imbricatus Say . . . 



Hylobius pales Hbst 



Rhynchites mexicanus Gyll 



Tych ius sordidus Lee 



Ophryastes bituberosus Shp ... 



Trichobaris mucorea Lee | Tobacco-stalk weevil. 



«In the preparation of this list we are under obligations for assistance to Mr. 

 F. H. Chittenden, who has also furnished information in regard to the food habits 

 of the species. 



21739— No. 45—04 i 



Beetles attack rose 



Common in cotton fields. 



Found on cotton 



Tobacco stalks 



