GALERUCINE BEETLES — BLAKE 69 



tarsal joint as in the group with the excised middle tibiae. In short, 

 Phyllobrotica is not much more closely related to Phyllecthrus than is 

 Diabrotica. 



I wish to acknowledge my indebtedness to the U. S. National 

 Museum and the Museum of Comparative Zoology for the material 

 on which this study is based, Mr. G. E. Bryant of the British 

 Museum (Natural History) has kindly made comparisons of types 

 there and loaned me other specimens. Dr. Floyd Werner has sent me 

 specimens from Arizona, and Mr. H. J. Grant has sent me notes on 

 the Horn types. Dr. J. A. Wilcox has sent me a specimen with 

 excised tibiae that he found in the Cornell University collection 

 together with notes on other species, and called my attention to others 

 in the Bowditch collection. 



Key to genera of Galerucini here treated 



1. Elytra without epipleura or the epipleura so narrow as to be inconspicuous, 



middle tibiae not excised in male Phyllobrotica 



Elytra with epipleura. Middle tibiae in male excised 2 



2. Two anterior pairs of tibiae in male shallowly and broadly emarginate. 



Distal four joints of antennae in male greatly enlarged; claws bifid. 



Diabrotica dilaticomis Baly 

 Middle tibiae alone deeply and narrowly excised. Claws appendiculate . . 3 



3. Antennae 10-jointed in male Phyllecthrus 



Antennae 11-jointed in male 4 



4. Face excav^ated in male, third antennal joint much deformed, a nodule in 



middle of pronotum Oroetes 



Face in male not excavated 5 



5. Hind femora in male greatly swollen Leptonesiotes 



Hind femora in male not swollen 6 



6. Disk of pronotum not depressed Ectmesopus 



Disk of pronotum with transverse semicircular depression 7 



7. Antennae in male with the distal joints thickened Luperosoma 



Antennae in male with the distal joints not thickened 8 



8. Third antennal joint in male very short, cup-shaped, truncate at apex. 



Platymorpha 



Third antennal joint in male usually much longer than second, not cup-shaped 



at all, or truncate at apex Iceloceras 



Genus Phyllecthrus LeConte 



Phyllecthrus LeConte, Proc. Acad. Nat. Sci. Philadelphia, p. 207, 1865. 



The original generic description is as follows: 



Body elongate, glabrous and nearly smooth above. Head transversely impressed 

 between the eyes, and with a short median impressed line; acutely carinate be- 

 tween the antennae, which are very long, 2nd and 3rd joints together shorter 

 than the 4th, nearly equal in size in the female, 2nd connate with the 3rd, and 

 nearly obsolete in the male. Maxillary palpi stout, the last joint shorter than 

 the preceding, slender, subsulcate, acute at tip. Prothorax quadrate, truncate 

 at the apex with a lunate dorsal impression more or less distinct. Elytra with 



