ART. ly REVISION OF THE USECHINI BLAISDELL 7 



Type locality. — Santa Clara County, Calif. Four specimens with- 

 out other data in the Van Dyke collection. Type a male and para- 

 type in the collection of the California Academy of Sciences, and one 

 in the author's collection. A para type has also been deposited in the 

 collection of the United States National Museum in Washington. 

 Other specimens from the Koebele collection are in the California 

 Academy of Sciences and in the United States National Museum. 



Paratype. —C&t. No. 40379, U.S.N.M. 



Distribution. — Santa Cruz Mountains of California. 



USECHUS LACERTA TRINITATIS, new variety 



Less elongate and rather more robust than lacerta Motschulsky, 

 surface less roughly sculptured. Sides of the prothorax more promi- 

 nently angulate across the extremities of the antennal fossae, thence 

 more strongly convergent anteriorly to the apex. Pronotal disk 

 quite strongly sculptured, median groove broad, well defined by 

 prominent borders and basal impression rather deep. 



Elytral sides more arcuate, the intervals nearly &s in lacerta: third 

 most pronounced on the apical declivity, seventh joining the fifth 

 (fig. 1, D) at about middle, thence quite prominent to opposite 

 tubercle of ninth; sixth interval slightly indicated between the strial 

 punctures, ninth very feebly angulate laterally at side of the declivity. 

 Discal punctures very coarse in the fu'st four series. 



Antennal club less strongly developed than in lacerta. Ninth and 

 tenth joints about equal in length and width, the eleventh more 

 rounded, about as long as wide and scarcely as wide as the tenth. 

 First ventral segment feebly but distinctly impressed at middle. 



Measurements. — Length (type) 4.5 mm.; width 1.6 mm. 



Type locality. — Trinity County, Calif. Collected on January 17, 

 by E. R. Leach. Two specimens studied, holotype, male and, 

 allotype, female. Types in the author's collection to be deposited in 

 the collection of the California Academy of Sciences. 



The variety trinitatis might correctly be considered a subspecies, 

 but on account of the small number of specimens studied it has been 

 thought best to give it a minimum grade. 



USECHUS NUCLEATUS Casey 



Plate 1, figure 1 



Usechus nucleatus Casey, Ann. New York Acad. Sci., vol. 5, p. 176. Mar. 1890. 



Form very much smaller in size, less elongate and relatively broader 



than lacerta Motschulsky. Color brown-black to piceo-testaceous 



and duller in luster. Pubescence sparse, consisting of slender yellow 



subsquamiform hairs, denser on or at site of the tubercles. 



Head finely and sparsely punctate. Eyes transverse, rather broadly 

 rounded above, broadly and very feebly emarginate behind the 

 antennae. The latter less stout than in lacerta; first two joints a 



