Proceedings of the United States National Museum . 0-1 mm. Ot mm Figure 10.—Pimplinae, head sclerites: a, Xorides rileyi (Ashmead) (Xoridini); b, Arotesformosus Cresson (Acaenitini), antenna not visible on preparation. (1, antenna; 2,spiracle; 3, skin.) ICHNEUMONID FINAL INSTAR LARVAE—SHORT 417 It has been already noted that the Acaenitini have characterssimilar to those of the two groups of the Pimplinae, the Ephialtiniand similar tribes, and the Pimplini. In the genus Arotes the epistoma and pleurostoma are moderatelysclerotized and broad; the hypostoma is moderately sclerotized butvery slen
Proceedings of the United States National Museum . 0-1 mm. Ot mm Figure 10.—Pimplinae, head sclerites: a, Xorides rileyi (Ashmead) (Xoridini); b, Arotesformosus Cresson (Acaenitini), antenna not visible on preparation. (1, antenna; 2,spiracle; 3, skin.) ICHNEUMONID FINAL INSTAR LARVAE—SHORT 417 It has been already noted that the Acaenitini have characterssimilar to those of the two groups of the Pimplinae, the Ephialtiniand similar tribes, and the Pimplini. In the genus Arotes the epistoma and pleurostoma are moderatelysclerotized and broad; the hypostoma is moderately sclerotized butvery slender; the hypostomal spur is broad and very lightly sclerotized;the stipital sclerite is short, broad and very lightly sclerotized; thelabial sclerite is roughly triangular in shape, but the ventral part ismuch broader than the lateral parts as in the Pimplini; the maxillarypalps each bear one large, round sensillum and a group of smallersensilla; each labial palp bears one large round sensillum and onesmall sensillum; the labral sclerite is absent an
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
