274 Annals Entomological Society of America [\o\. XI, 



17. ToUius curtulus Stal. 



Alydus curtulus Stal (1859b) 234i. 

 Alydus {ToUius) curtulus Stal (1870) 213. 



Tollius curtulus Uhler (1876) 294^, (1894) 236^ Gillette and Baker (1895)'; Barber 

 (1911)5; Van Duzee (1916)«, (1917)". 



Description. — Color varying from grayish testaceous to fuscous; 

 pubescent. Head grey above, marked with pale longitudinal stripes 

 through eyes, beneath eyes and obscurely along dorso-meson; ventral 

 surface black. Antennae pale, first and fourth segments darker. 



Pronotum griseous, disc marked with a pair of fuscous, slightly 

 divergent vittae, more obscare than in setosus. Scutellum with median 

 line obscure. Corium always marked along costal margin with fuscous 

 dots, which sometimes cover entire surface. Femora mottled, some- 

 times fiavo-annulate. 



Claspers of male (Fig. 11) slender, one-fourth as wide as long, with 

 basal half flattened, apical half gradually twisted; apex subtruncate, 

 especially as seen f roni the side ; caudo-lateral portion of pygof ers tumid , 

 distincth^ marked off from the ventral surface of the segment by a deep 

 notch ventrad of their apex. Female with lateral plates of hypopygium 

 contiguous at tip; mcsal plates elongate, triangular, resembling those of 

 Alydus pilosulus. 



Length, 9.5 to 11 nmi.; width 2.2 to 2.7 mm. 



The widespread distribution of this comparatively uncom- 

 mon insect has not been appreciated until recently. It is 

 now known from New York'\ Illinois^, Colo^ado^ Utah^ 

 Oregon, California^'^-~^ and Lower California^ The Illinois 

 record is from a Chicago specimen in the Milwaukee museum 

 and the Oregon one from ten specimens kindly loaned by 

 Mr. H. G. Barber. 



The shape of the male claspers at the apex, and of the 

 pygofers are distinctive, though the twisted shape of the claspers 

 makes the truncate apex difficult to see. The color markings 

 of the insect are not nearly as attractive as in setosus, the sharp 

 contrasts of the latter being wholly wanting. Twenty-six 

 specimens from New York, Illinois, Colorado, Oregon and Cali- 

 fornia have been examined by the writer and the description 

 is based on them. 



18. Tollius setosus Van Duzee. 



Alydus setosus Van Duzee (1906)i; Snow (1907)=; Barber (1911)''; Bueno (i913b)^. 

 Tollius setosus Van Duzee (1914)^ (1917)«. 



Description. — Color fiavescent to castaneous, marked attractivel}'' 

 with fuscous. Dorso-mesal pale line continuous from tylus to tip of 

 scutellum, conspicuous. Ventral surface of head black, often narrowly. 

 Divergent vittse of pronotum conspicuous. Corium with the anal 



