Suwallia Ricker 1943

DIAGNOSIS: The general color of species in this genus is yellow in both life and when preserved in alcohol (Fig. 120), with dark pigmentation in the ocellar triangle, dark antennae, thin medial and peripheral stripes on the pronotum, U-shaped markings on the meso- and metanota, and a wide medial abdominal stripe extending most of the length of the abdomen. On males, setose finger-like medially-directed hemitergal processes originate from segment 10 (Fig. 123). The unhinged, knob-like epiproct (Fig. 123) is distinct from all other Chloroperlidae. The female subgenital plate covers sternum 8 and gradually narrows to a rounded or truncate apex (Fig. 124), covering much of sternum 9 as well. The nymphs exhibit distinct dark pigmentation (Fig. 129) between and anterior to the ocellar region, and have dense dark hairs in patches on thoracic sterna.

DISTRIBUTION—Global: Nearctic & East Palearctic— Regional: AOB, IDB— Aimag: AR, BO, BU^, GA^, KhD, KhG, OV^, SE, TO, UB*,UV*, ZA.

DISCUSSION: Suwallia is the most common genus of Chloroperlidae in Mongolia and is found in a large variety of habitat types. Detailed species descriptions and SEMs are given in Alexander and Stewart (1999).