1864.] 



155 



varied witli fulvous or pale ferruginous, the tips of the first, second, 

 third and fourth segments bright yellow, their middle yellowish-ferru- 

 sinous, their basal third black, as well as the base of the fifth and sixth 

 segments, the remainder of these segments and also the apical segment 

 entirely, fulvous ; basal segment distinctly bilineated ; basal foveas of 

 the second segment small and transverse ; fifth and following segments 

 smoother than the preceding ones, and somewhat shining ; beneath, 

 the segments are yellow varied with fulvous, the basal segment black, 

 the middle of the second and three following segments yellow with a 

 black spot on each side at base ; apical segments fulvous. Length 6i 

 — 7^ lines; expanse of wings 11 — 12^ lines. 



Varieti/ % . — Difiers from the above by having the cheeks, disk of 

 the thorax above and the sides of the pleura more or less yellowish- 

 ferruginous ; in one specimen the pleura has on each side a broad yel- 

 lowish-ferruginous dash. Length 6 lines. 



Eah. — Rocky Mountains, Col. Ter. Illinois. Dr. Saml. Lewis. 



The two specimens from Illinois are not so bright in color as those 

 from Colorado, the ferruginous color being very dull, approaching fus- 

 cous, especially at the apex of the abdomen. I have no doubt of their 

 identity. 



I dedicate this beautiful species to my friend Mr. Aug. R. Glrote of 

 New York. 



Irh. jHcundits Brulle also belongs to this Section. 



Section 5. 

 32. Ich. nobilis, n. sp. 



Black ; face, scutelhxm, metathorax and legs in part, and posterior portion of 

 the first 4 abdominal segments, yellow ; central area of metathorax transverse. 

 Male. — Head black ; the face beneath the antennae, orbits, clypeus, 

 mandibles and palpi, yellow ; antennae porrect, about half the length 

 of the body, black, basal joint beneath yellow. Thorax black, shining, 

 closely punctured, clothed with short fuscous pubescence ; collar above, 

 tegulse, a broad sutural line before and a short line beneath the wings, 

 yellow; scutellum convex, yellow, as well as a short line behind it; 

 metathorax mostly yellow, its anterior, posterior and lateral margins 

 black, the elevated lines well defined, the central area moderate, trans- 

 verse. Wings subhyaline, stained with yellowish ; nervures fuscous, 

 testaceous at base, stigma fulvous ; areolet 5-angular. Legs yellow, a 



