Proceedings of the United States National Museum . 2. Labral sclerite present * Opheltes Protarchiis 22Labral sclerite absent 3 3. Six setae on prelabium Mesoleius Four setae on prelabium Lophyroplectus 4. Posterior end of hypostoma with small expansion Hypsantyx Posterior end of hypostoma without small expansion Latnachus The broad ventral end of the hypostomal spm- figured in Lamachusvirginianus (Rohwer) appears to be present only in this other species of Lamachus the ventral end of the hypostomal spuris slender. In most species of Lamachus examined the dorsal ends ofthe labial sc
Proceedings of the United States National Museum . 2. Labral sclerite present * Opheltes Protarchiis 22Labral sclerite absent 3 3. Six setae on prelabium Mesoleius Four setae on prelabium Lophyroplectus 4. Posterior end of hypostoma with small expansion Hypsantyx Posterior end of hypostoma without small expansion Latnachus The broad ventral end of the hypostomal spm- figured in Lamachusvirginianus (Rohwer) appears to be present only in this other species of Lamachus the ventral end of the hypostomal spuris slender. In most species of Lamachus examined the dorsal ends ofthe labial sclerite had pronounced bubble-shaped projections similarto those of Hypsantyx and the Euryproctini. The following have been examined: Opheltes glaucopterus jlavi-pennis (Provancher) (fig. 42a), Mesoleius tarsilas (Cresson), Morley (fig. 42b), Lamachus albopictus Cushman, L. Opheltes differs from Profarchus in that the ventral part of the labial sclerite is less Of Beirne (1941). ICHNEUMONID FINAL INSTAR LARVAE—SHORT 469. O • 1 Tnm Figure 42.—Mesoleiinae:Mesoleiini, head sclerltes: a, Opheltes glaucoptenis flavipennis(Provancher); b, Mesoleius tenthredinis Morley, antenna not visible on preparation.(1, antenna; 2, spiracle; 3, skin.) 470 PROCEEDINGS OF THE NATIONAL MUSEUM
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
