1918] Alydiucc of the United States 275 



area much darker than the costal and apical margins which are 

 unspotted. Femora various in color. 



Claspers of male (Fig. 12) short, flat, quadrangular, suddenly 

 obliquely tmncate at tip, dorso-lateral apex acute ; cauda-lateral portion 

 of pygofers scarcely tumid, apex rectangular, not distinctly marked off 

 from ventro-caudal margin of segment by a notch. Female with 

 lateral plates of hypopygium slightly wider at base than in curtulus. 



Size 10 X 2.4 mm. 



Originally described as an Alydus and compared with 

 A. eurimis, Tollius setosus has never been satisfactoril}^ dis- 

 tinguished from Stal's species. The variability in coloration 

 in each of them and their similarity in distribution has caused 

 some confusion. The characters used above are derived from 

 a pair collected by Mr. Van Duzee, in California, compared 

 by him with the type, a male, and kindly loaned the author. 

 Two other specimens are at hand, a female from Mt. View, 

 California, in the Ball collection, and a male sent from Mr.. 

 H. G. Barber, as having been collected in Kingsbridge, N. Y. 

 These are identical wdth those from Mr. Van Duzee. 



The distribution of T. setosus includes Arizona^"-, Utah^ 

 California^"'^"^ and Montana^ in addition to the Neiv York 

 record. 



Stachyocnemus Stal. 

 Haplotype apicalis Dallas. 

 Stachyocnemus Stal (1870j 215, (1873) 91. 



Many characters make this genus the most aberrant one 

 of the tribe. The complete obsolescence of the scent-gland 

 orifices, the spinose posterior tibise, the shape of the male 

 hypopygium which conceals the claspers, and the absence or 

 concealment of the mesal plates of the female hypopygium are 

 unique. The afifinities are clearly with Tollius. 



19. Stachyocnemus apicalis Dallas. 



Alydus apicalis Dalkus (18.52) 479'. 



Stachyocnemus apicalis Stal (1870) 215; Uhler (1872) 402-, (1876) 2943, (1877b) 



1325^ Heidemann (1902) 8P; Snow (1906a)^ (1906b)'; Van Duzee (1909)«; 



Smith (1910)^ Bueno (1913a)i0; Barber (1914)ii. 



Description. — Body covered with short stiff black setse and more or 

 less gray pubescence. For color, see varieties below. Antennee with 

 first segment widened to tip, second and third slender, subequal; fourth 

 longer and thicker than others. 



Pronotitm with posterior margin bearing a mesal tooth. Hemelytra 

 variable in length, usually slightly surpassing apex of abdomen. Anterior 

 and intermediate femora and tibias slender and unarmed; posterior 



