Seining watercourses, a new method for collecting flat bugs? (Hemiptera, Heteroptera, Aradidae) Author Heiss, Ernst Author Barr, Cheryl text Linzer biologische Beiträge 2017 2017-07-28 49 1 131 145 journal article 10.5281/zenodo.5356488 0253-116X 5356488 Aradus ampliatus UHLER , 1876 ( Photo 3 , Fig. 5; Table I , Figs 1-5) M a t e r i a l e x a m i n e d: 2♀♀ , 28 V 2015 ( 2 specimens ). Aradus ampliatus seems to be rare and is recorded only from California and Utah . It is a large, dark colored species and easily recognized by the third antennal segment which has a yellowish apical ring. Its size of about 10mm and the pronotal structure resemble that of Aradus crenatus SAY, 1831, from the eastern USA Aradus crenatus ( Photo 5 , Fig. 18) is distinguished by stramineous coloration of body and antennae and also different male genitalic structures which are illustrated for both species (Table II, Figs 11-15; Table I , Figs 1-5). A d d i t i o n a l m a t e r i a l inCEHI:13 Washington , Boulder Cave , 10 V 1947 ( new state record ) ; 1♀ Oregon , Klamath Falls , 23 IV 1953 ( new state record ) ; 1♀ California , Mariposa Co. , 6 V 1942 .