1984, ISBN: 9781235821684

Paperback. New. This item is printed on demand. Paperback. This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (… Meer...

Paperback. New. This item is printed on demand. Paperback. This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1984 Excerpt: . . . The signaticornis-pinicola Group The signaticornis-pincola species group is a diverse assemblage, which in some respects would be easier to characterize if split into the component sub-groups. However, some species display intermediate characters between the two, and I feel the assemblage as a whole is monophyletic. The following features are shared in common: 1. Hypandrium broad, flat, not clasping the aedeagus basally. 2. Epandrial lobes with separate cylindrical bases, often positioned laterad of each other. 3. Epandrial seta always presentk 4. Hypopygium often massive, as large as preabdomen. 5. Dorsocentrals (dc) 6-10, decreasing gradually anteriorly, merging into a field of setae extending laterally to the postpronotum (Fig. 4). 6. Relatively large species, usually longer than 2. 8 mm. 7. Both lateral and median scutellars well developed. 8. On leg III, tarsomere 1 less than twice the length of tarsomere 2. 9. Antennal scape and pedicel almost always yellow; scape often elongate. 10. Female segment 9 10 with a pair of apical projections (Fig. 13). The signaticornis-pinicola group is closely associated with the Holarctic circumboreal forests and contains the important predators of conifer-attacking Scolytidae. I have seen no representatives of this group from the Oriental, Australian, or Afrotropical regions, and the only members of this group from the Neotropics are southern extensions of the widespread Nearctic M. aldrichii and M. bistriata. in the montane pine forests of southern Mexico and Honduras, respectively. The signaticornis subgroup is characterized by: 1 Cerci tapering without apical processes. 2. Aedeagus often tridentate. 3. Epandrium subtriangular in lateral view. 4. Surstyli elongate. 5. Antennal scape and pedicel always yell. . . This item ships from La Vergne,TN.<