1864.] 158 



Section 4. 



29. leh. variegatus, n. sp. 



Black; face, scutellum, metathorax, legs in most part, and basal i of second 

 abdominal segment, yellow; rest of abdomen, except basal segment, rufous; 

 wings subhyaline: central area of metathorax subquadrate and transverse. 



Male. — Head black, the face beneath the antenna}, frontal orbits, 

 clypeus, spot on mandibles, and the palpi, bright yellow ; antennae por- 

 rect, nearly as long as the body, black, basal joint beneath yellow. 

 Thorax black, polished, very finely punctured ; tegulae, a sutural line 

 before and a line beneath the wings, yellow; scutellum slightly convex, 

 polished, entirely bright yellow; metathorax densely punctured, yel- 

 low except its anterior and lateral margins, the elevated lines tolerably 

 well defined, the central area moderate, transverse, subquadrate. Wings 

 subhyaline, slightly fuliginous ; uervures and stigma piceous, paler at 

 base ; areolet 5-angular. Legs bright yellow, the posterior coxae, fe- 

 mora and apical half of the tibiae, black. Abdomen elongate, rather 

 slender, opaque, densely and very finely punctured ; basal segment 

 black, distinctly bilineated and finely aciculate; second segment bright 

 yellow, its apical half dull rufous, the basal foveae small, black, coarsely 

 aciculate ; remaining segments dull rufous, the third segment having; 

 on each side an irregular yellowish stain dilated laterally; apical seg- 

 ments smoother than the basal ones ; beneath pale ferruginous, the 

 middle of the segments stained with yellowish. Length 8 lines; ex- 

 panse of wings 11 J lines. 



Variety % . — Differs from the above as follows : — The four anterior 

 femora have a black spot behind, the wings are clearer, the apical half 

 of the 2nd abdominal segment is yellowish-ferruginous as also the basal 

 foveae, the 3rd segment above is entirely yellow, except the basal incis- 

 ure which is black, the remaining segments are dull rufous, the 4th 

 and 5th each having a narrow black fascia at base. Length 6^ lines. 

 ITab. — Rocky Mountains, Colorado Territory. 



30. Ich. inconstans, n. sp. 



Black ; face, scutellum, legs, the 2nd, 3rd, 4th and two apical segments of 

 abdomen, more or less yellow ; wings subhyaline ; central area of metathorax 

 moderate, subquadrate. 



31ale. — Head black; the face beneath the antennte, clypeus, man- 

 dibles (except the base which is piceous), and the palpi pale yellow ; 

 antennae porrect, rather more than half the length of the body, black. 



