LeConte.] HYLURGLN1. 379 



joints, which united are nearly or quite as long as the club. The tibiae are 

 finely serrate at and near the tip; the joints 1-3 of the tarsi are rather broad 

 and equal, the third bilobed; the fifth about equal to the others united, and 

 rlavate, with simple, divergent claws. 



With one exception, the species are densely clothed with flat scales, and 

 variegated in color with pale and dark gray tints. 



Body oval, clothed with pale and dark scales, with- 

 out intermixed hairs 2. 



Body elongate , 4. 



2. Club of antennae elongate-fusiform, bands of elytra 



oblique 3. 



Club of antennae oval, body stouter, bands of elytra 



transverse 3. fasciatus. 



3. Sides of prothorax muricate before the middle 1 . imperialis. 



not muricate 2. aculeatus. 



4. Clothed with scales, with rows of bristles on the elytra 4. sericeus." 

 Clothed with short, erect yellow hair, without scales 5. opaculus. 

 Thinly and finely pubescent; prothorax muricate at 



the sides 6. aspericollis. 



1. H.Jmperialis Eichhoff, Berl. Ent. Zeitschr. 1868, 149 ; Lee., Tr. 

 Am. Ent. Soc.TsGS, 169 ; H. aculeatus \ Chapuis, 1. c. 32. 



Dakota and Arizona. Resembles the next species, but is easily known 

 by the muricate punctures of the sides of the prothorax ; the basal edge of 

 the elytra is also more strongly serrate. There is no such difference in the 

 depth or punctuation of the elytral striae as to warrant the differential 

 phrases used by Dr. Chapuis. It is found also in Wisconsin and Georgia, ac- 

 cording to Eichhoff, and seems to me to be barely distinct from the follow- 

 ing species. 



2. H. aculeatus Say, Journ. Ac. Nat. Sc. Phil, iii, 322 ; ed. Lee., ii, 

 181; Zimm., Tr. Am. Ent. Soc. 1868, 149; H. pruinosus Eichhoff, Berl. 

 Ent. Zeitschr. 1868, 149 ; Chapuis, Mem. Soc. Roy. Sc. Liege, 1869, 32. 



Massachusetts to Texas, Kansas and Oregon ; depredates on Fraxinus. 

 So far as the distinctions exist between this and the preceding, they are 

 well exhibited in the descriptions of Eichhoff; to whom, however, the de- 

 scriptions of Say seem to have been unknown. It has happened unfor- 

 tunately that Dr. Chapuis has applied Say's name to the less known form 

 called imperialis by Eichhoff, and retained pruinosus for the present well- 

 known and widety diffused form. 



The Munich Catalogue has added to the confusion by citing Say's de- 

 scription under the genus Dendrosinus (2673), and placing H. globosus 

 Eichhoff, as a synonym. The latter is probably a South American species, 

 described by Eichhoff, with an incorrect locality, since a variety of it is 

 mentioned by Chapuis (p. 28) as occurring in Columbia. Length 2.2- 

 3.4mm.; .09-. 13 inch. 



In the $ the head is more flattened than in the 9 ; and occasionally 



