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haematopus
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suturalis
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convictus
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The species belonging to this group have the anterior thighs unidentate. The ventral segments decreasing in length from the second, the third segment being always longer than the fourth, and this longer than the fifth, at least in the male, except corvulus, where the fifth is scarcely shorter than the fourth segment. In general, the species are rather sparsely pubescent, except subguttatus, all the femora armed with a single tooth (hind pair mutic in melancholicus), although the tooth of the posterior pair becomes nearly obsolete in specimens of subguttatus and morulus. The tarsi are more slender than in the next group, and the first joint longer than the second; the elytra are without a denuded fascia; lines and spots of pubescence do not occur, except in subguttatus, more rarely in flavicornis.
Dietz included the following species in the A. suturalis group.
Anthonomus bolteri Dietz (Dietz 1891:208)
Anthonomus rubellus Dietz (Dietz 1891:208)
Anthonomus confusus Dietz (Dietz 1891:209)
Anthonomus sycophanta Walsh (Dietz 1891:209)
Anthonomus suturalis LeConte (Dietz 1891:210)
Anthonomus brunnipennis Mannerheim (Dietz 1891:211)
Anthonomus melancholicus Dietz (Dietz 1891:211)
Anthonomus flavicornis Boheman (Dietz 1891:211)
Anthonomus morulus LeConte (Dietz 1891:212)
Anthonomus corvulus LeConte (Dietz 1891:213)
Anthonomus subguttatus Dietz (Dietz 1891:213)
Dietz 1891:207. suturalis Group. The species belonging to this group have the anterior thighs unidentate. The ventral segments decreasing in length from the second, the third segment being always longer than the fourth, and this longer than the fifth, at least in the male, except corvulus, where the fifth is scarcely shorter than the fourth segment. In genera, the species are rather sparsely pubescent, except subguttatus, all the femora armed with a single tooth (hind pair mutic in melancholicus), although the tooth of the posterior pair becomes nearly obsolete in specimens of subguttatus and morulus. The tarsi are more slender than in the next group, and the first joint longer than the second; the elytra are without a denuded fascia; lines and spets of pubeschence do not occur, except in subguttatus, more rearly in flavicornis.
The species are closely related, and while it is not difficult to recognize typical specimens, aberrant forms occur whise exact position it may not be always easy to determine.
I have arranged the species as follows [key to species]
Burke has the following species in the A. suturalis group.
Anthonomus bolteri Dietz 1891:208
Anthonomus confusus Dietz 1891:209
Anthonomus convictus Gates 1972:1216
Anthonomus haematopus Boheman 1843:222
A. sycophanta Walsh 1867:265 (synonymy by Burke 1968:40)
Anthonomus morulus LeConte 1876:201
Anthonomus rubricus Schenkling & Marshall 1934:48
New name for A. rubellus Dietz 1891:208, not Desberger 1835
Anthonomus suturalis LeConte 1824:171
A. erythopterus, A. erythropterus Say 1831:25
A. flavicornis Boheman 1843:231 (synonymy by Burke 1975:61)
A. hicoriae Pierce 1908:175 (synonymy by Burke 1975:61)
A. vespertinus Dietz 1891:216 (synonymy by Burke 1975:61)
Burke 1976:292. List A. haematopus in galls incited by sawflies of the genera Euura and Pontania on Salix spp.; Anthonomus morulus in galls of Pontania pacifica on Salix lasiolepis; and Anthonomus suturalis in galls caused by Phylloxera sp. on leaves of hickory and pecan.
p. 296. A. convictus, A. haematopus and A. suturalis in galls mentioned.
Hatch 1971:346-347. Key to species in "suturalis group," including A. confusus Dietz, A. haematopus Boheman, A. corvulus Leconte and A. morulus LeConte.