of neiv species of Tenthredinidce, S^'c. 389 



thorax has a minute yellow spot In front of the tegulse ; the 

 abdomen has the three basal segments ferruginous, the 

 rest black. 



5. Ichneumon Jlavitar sis. 



Male. — Length 7^ lines. Black, with the scutellum 

 and the legs partly yellow. Head : the face and scape of 

 the antennffi iu front pale yellow ; the palpi white. Thorax : 

 the margins of the prothorax towards the tegute, the 

 latter in front and a line beneath the wings, pale yellow ; 

 Avings hyaline and iridescent ; the anterior femora in front 

 fulvous ; all the tibia? and tarsi yellowish-white, the 

 })osterior tibia? at their apex and the tips of the two first 

 joints of the tarsi fuscous ; the insect very closely punc- 

 tured ; the apical half of the abdomen with an obscure 

 blue tinge. 



This species closely resembles Ichneumon multiannu- 

 latus of Europe, but the latter has the posterior tarsi black, 

 except the base of the first joint. 



6. Ichneumon virulentns. 



Female. — Length 4 lines. Black, with the two apical 

 segments of the abdomen white. Four or five of the 

 middle joints of the antenna white beneath. The thorax 

 and legs have a fine, short, hoary doAvn ; the anterior and 

 intermediate tibisB white outside ; the spines at the apex 

 of all the tibia? white ; the Avings subhyaline ; the meta- 

 thorax has two central enclosed spaces, the first half the 

 size of the second ; on each side of these are two enclosures. 

 The entire insect is closely punctured and semi-opaque, 

 Avith the three apical segments of the abdomen shining. 



7. Ichneumon improvidus. 

 Male.— Length 4^ Hues. Black, Avith the face below 

 the antenna? and the "scape in front Avhite. The flagellum 

 of the antennfB fulvous beneath ; the mandibles and pal])i 

 Avhite. The anterior and intermediate femora towards 

 their apex, and their tibia? and tarsi, rufo-testaceous ;_ the 

 Avings subhyaline; the enclosed space at the base of the 

 metathorax horseshoe-shaped, with two oblique carma?, 

 also two lateral carina?, the intermediate spaces rugose. 

 Abdomen elongate, shining, and finely punctured towards 

 the base. 



