OP WASHINGTON, VOLUME XIV, 1912. 25 



A REVISION OF THE GENUS LASCONOTUS ER. 



(Coleoptera; Colydiidse.) 

 BY E. J. KRAUS.* 



Since 1890, when Colonel Casey published descriptions of 

 several new species of Lasconotus, practically nothing has 

 been written concerning the species occurring in the United 

 States. In the interval several new forms have accumulated, 

 and the present opportunity is taken to describe them and 

 make a complete revision of the genus. 



In the synopsis of species will be found the type locality of 

 each species, and under the discussion of species will be 

 found a complete list of localities from which specimens have 

 been examined. The designation Hopk. U. 8. refers to speci- 

 mens in the Forest Insect Collection, largely collected by Dr. 

 A. D. Hopkins, H. E. Burke, J. L. Webb, and W. F. Fiske 

 during investigations in the Branch of Forest Insect Investi- 

 gations of the Bureau of Entomology. The designation U. 

 S. N. M. refers to specimens in the U. S. National Museum. 

 For the latter, credit is given in each case, where known. 



I wish to express uiy sincerest thanks and appreciation to 

 Mr. E. A. Schwarz, who turned over to me the abundant ma- 

 terial in this group in the U. S. National Museum for study, 

 and to whom I am greatly indebted for more numerous kindly 

 helps and suggestions throughout the preparation of this paper 

 than I can well enumerate; to Dr. A. D. Hopkins, who has 

 kindly allowed me free use of all the material and notes in the 

 Forest Insect Collection; to Mr. S. Henshaw, of the Museum 

 of Comparative Zoology, at Cambridge, Mass., for the privi- 

 lege of making a personal examination of the LeConte types; 

 to Dr. H. Skinner, of the Philadelphia Academy, who extended 

 a like courtesy with respect to the Horn types; and especially 

 to Mr. W. F. Fiske, who most generouslj^ allowed me the use 

 of his unpublished systematic notes on this genus. 



The genus Lasconotus was described in 1845 by Erichson, 

 who based his description on an undescribed species from 

 Mexico. He characterizes it as follows: 



Die Schienen an der Spitze ein wenig erweitert, und hier ausser 

 den kleinen Enddornen noch mit feinen Dornehen besetzt. Die drei 

 ersten Glieder der Ftisse gleich kurz. Fiihlerkeule dreigliedrig. Kor- 

 perform und fast auch die Sculptur von Ditoma. Die Augen vollkom- 

 men rund, ganz unter dem Seitenrande der Stirn liegend, welcher sich 

 oberhalb derselben bis zum Scheitel fortsetzt. Die Spitze der Mandi- 

 beln zweizahnig. Die Fiihlerrinnen auf der Unterseite des Kopfes 

 undeutlich. Eine neue Art aus Mexico. 



This paper was written by the author while in the employ <>f the Bureau ot 

 Entomology, U. S. Department of Agriculture, under the direction of Dr. A. 1>. 

 Hopkins, in charge of forestry insects. 



