280 [September 



indications of a tubercle on each side of the basal third, its color is 

 black, except the tip which is rufous as well as all the remaining seg- 

 ments. Length o} lines; expanse of wings 6? lines. 

 H<ih. — Illinois. Dr. Samuel Lewis. 



13. Tryphon tibialis, n. sp. 



Black ; mouth, base of antenn c beneath, tegulfe and most of legs, yellowish ; 

 middle of abdomen pale rufous, wings hyaline, iridescent, areolet minute, ob- 

 lique, petiolated ; hind tibiffi and tarsi annulated with black and white; abdo- 

 men subpetiolated, clavate. 



Mah. — Black, polished, slightly pubescent; face clothed with silvery 

 pubescence, the clypeus, mandibles except tips, and the palpi, yellowish ; 

 antennaj rather longer than the body, rather slender, brown-black, the 

 two basal joints beneath yellow. Thorax polished, tegul:\; yellowish ; 

 metathorax with the elevated lines not well defined, the central area 

 moderate, quadrate. Wing-s hyaline, beautifully iridescent ; nervures 

 and stigma dark fuscous, pale at base ; areolet minute, oblique and 

 petiolated ; 2nd recurrent nervure slightly bent inwards near the base. 

 Legs pale fulvous, the four anterior coxae, their tibia) and tarsi and all 

 the trochanters, pale yellowish ; posterior tibije black with a broad whit- 

 ish annulus on the middle, their tarsi black, the joints whitish at base. 

 Abdomen subpetiolated, subclavate, polished, black, the apical third of 

 the first, the second and third segments pale yellowish-rufous, on each 

 side of the third segment a rounded blackish stain ; basal segment 

 slightly carinated on the disk, with a small, ill-defined tubercle on each 

 side about the middle. Length 2 J lines; expanse of wings 4] lines. 



Hah. — Illinois. Dr. Samuel Lewis. 



14. Tryphon rufocinctus, n. sp. 



Black: most of legs and the 2nd and 3rd segments of abdomen, dull rufous ; 

 wings hyaline, iridescent, areolet wanting ; abdomen nearly sessile. 



Female. — Black, subopaque ; head and antenna) entirely black, the 

 latter two-thirds the length of the body ; tegula) pale yellowish ; meta- 

 thorax with the elevated lines subobsolete, the central area small and 

 elongate. Wings hyaline, beautifully iridescent ; nervures and stigma 

 black, pale at base ; areolet wanting. Legs dull rufous or brownish, 

 all the coxae and the posterior femora black. Abdomen almost sessile, 

 black, the 2nd and 3rd segments rufous ; apical segments shining. 

 Length 2] lines; expanse of wings 4 lines. 

 Ilah. — Illinois. Dr. Samuel Lewis. 



