Dr. G. II. Horn on Usechtts lacerta. 293 



rilOPAGA ALTICEPS Lee. 

 This insect has also been reported from Owens Valley. Never hav- 

 ing fouiul it there I do not know its habits in that particular region. 

 "While travelling through Arizona I found specimens in the neighbor- 

 hood of Greasewood or Creosote bush (Larrea mexicana). It flies 

 but feebly, appearing rather to sustain itself in the air and to be blown 

 about by the wind, than to make any actual progression by its own 

 flight. Occurs in March and April. 



ULOCH^ETES LEOXIXUS Lee. 

 This insect makes its first appearance during the latter part of July. 

 I found a specimen at Fort Crook, under pine bark, and also a pupa 

 which I was unable to bring to maturity. It is not rare. 



On TJSECHTJS LACERTA Motsch. 

 BY GEO. H. HORN, M. D. 



This insect was originally described by Motschulsky, in Bulletin 

 Moscow, 1845, I, p. 79, and has remained unknown to American en- 

 tomologists until very recently. A few years since Motschulsky (Et- 

 udes Entomologiques, Ann. V, p. 22) made the statement that Use.clius 

 lacerta was identical with Rhagodera tuberculata Mann. This mistake 

 could have occurred only by a confusion of types, as the original de- 

 scription of Mannerheim could not be applied to the insect as figured 

 by Motschulsky. The one is a Colydiide and the other a Teneb- 

 rionide. The object of the present paper is to establish the relation- 

 ships of U&echus, as Motschulsky omits all mention of the position it 

 should occupy in a systematic arrangement. 



A single specimen of this rare insect is in my collection. For it I 

 am indebted to Dr. J. G. Cooper, by whom it was collected near Santa 

 Cruz, California. It probably occurs under the bark on oak stumps. 



The figure given by Motschulsky of this insect, though badly exe- 

 cuted, serves to give an idea of its general appearance. 



The hind margins of the ventral segments are all corneous, and the 

 middle coxa3 are squarely closed externally, not allowing the trochan- 

 ters to become visible. These characters seem to fix its position as a 

 member of the Sub-family of Tentyriidne. 



The apex of the ligula is visible beyond the mentum, which is rhoin- 

 boidal, with the anterior angles broadly rounded. The bases of the 



