Dolichothrips, Karny, 1912

Mound, Laurence A. & Okajima, Shûji, 2015, Taxonomic studies on Dolichothrips (Thysanoptera: Phlaeothripinae), pollinators of Macaranga trees in Southeast Asia (Euphorbiaceae), Zootaxa 3956 (1), pp. 79-96 : 81-82

Key to species of Dolichothrips

1. Posterior pair of legs uniformly yellow.................................................................... 2

- Posterior pair of legs with at least femora dark brown......................................................... 3

2. Fore femora largely brown, mid femora with small brown mark medially; antennal segment III yellow, but IV–VIII dark brown.......................................................................................... crassusensus

- All three pairs of legs uniformly yellow; antennal segments mainly yellow....................... ochripes and confusus

3. Antennal segments V–VIII brown, IV variably yellow-brown; mesonotal posteromedian cleft more than 0.6 as long as median length of this sclerite ( Fig. 12 ); tergite II with an extra pair of sigmoid wing-retaining setae anterolaterally, close to the antero- lateral campaniform sensilla ( Fig. 20 ); tergite IX setae S1 clearly shorter than tube.......................... fialae sp.n.

- Antennal segments IV–VI yellow; mesonotal posteromedian cleft less than 0.4 as long as median length of this sclerite ( Figs 10–11 ); tergite II without an extra pair of sigmoid wing-retaining setae close to the anterolateral campaniform sensilla ( Figs 18, 25 ); tergite IX setae S1 at least as long as tube............................................................... 4

4. Pronotum fully covered with prominent sculpture lines ( Figs 1, 3, 6 )............................................. 5

- Pronotum usually with no sculpture medially but with sculpture lines present near posterior and lateral margins ( Figs 4–5 ).. 7

5. Antennal segment VIII as yellow as VII except for light shading at apex; mesonotal lateral setae weakly capitate, 25 microns long ( Fig. 14 )................................................................................ franae sp.n.

- Antennal segment VIII brown, much darker than VII; mesonotal lateral setae finely acute, 10 microns long.............. 6

6. Postocular setae of female 65–85 microns long ( Fig. 3 ); fore femur inner ventral margin with well-defined row of tubercles ( Fig. 17 )..................................................................................... eriae sp.n.

- Postocular setae of female 110–135 microns long; fore femur inner margin of female only weakly rugose.... chikakoae sp.n.

7. Mesonotal lateral setae capitate, 35–50 microns long ( Fig. 13 ); tergites II–V each with an extra pair of sigmoid setae close to the anterior of the two major pairs of wing-retaining setae ( Figs 26–27 )........................................... 8

- Mesonotal lateral setae finely acute to blunt, 12–30 microns long; tergites II–V without an extra pair of sigmoid setae close to anterior pair of wing-retaining setae, sometimes with pair of small straight setae adjoining first wing-retaining setae ( Figs 23, 29 )................................................................................................ 14

8. Mid and hind tibiae yellow, or at least extensively yellow...................................................... 9

- Mid and hind tibiae brown............................................................................. 10

9. Pronotal anteromarginal setae 50 microns long, twice as long as maximum width of antennal segment II............ citripes

- Pronotal anteromarginal setal length no more than 35 microns, usually no longer than maximum width of antennal segment II........................................................................................... macarangai

10. Pronotum lateral thirds with longitudinal sculpture lines; pronotal midlateral setae usually smaller than anteromarginal setae, sometimes absent ( Fig. 5 ); hind tibiae relatively stout, no more than 5 times as long as wide.................. longicollis

- Pronotum lateral thirds without longitudinal sculpture lines; pronotal midlateral setae well-developed, as long as anteroangu- lars; hind tibiae slender, at least 6 times as long as wide...................................................... 11

11. Mid and hind tibiae yellow at apex.................................................................. varipes

- Mid and hind tibiae uniformly brown including apex........................................................ 12

12. Pronotum apparently without any sculpture............................................................ zyziphi

- Pronotum with narrow band of reticulation on posterior sixth................................................. 13

13. Pronotal posteroangular setae bluntly pointed, almost 4 times as long as width of antennal segment II; postocular setae longer than dorsal length of eyes; antennal segment VII uniformly brown...................................... fumipennis

- Pronotal posteroangular setae capitate, scarcely twice as long as width of second antennal segment; postocular setae shorter than dorsal length of eyes; antennal segment VII brown only on apical third to half.......................... utae sp.n

14. Mid and hind tibiae clear yellow..................................................................... reuteri

- Mid and hind tibiae brown, with apex variably yellow.................................................... indicus

Figures

FIGURES 7 – 16. Dolichothrips species. Head & pronotum 7 – 9: (7) macarangai; (8) fialae sp. n.; (9) utae sp. n. Mesonotum and metanotum 10 – 15: (10) chikakoae sp. n.; (11) eriae sp. n.; (12) fialae sp. n.; (13) utae sp. n.; (14) franae sp. n.; (15) reuteri; (16) indicus mesonotum and pelta.

FIGURES 17 – 33. Dolichothrips species. (17) eriae sp. n. fore leg; (18) chikakoae sp. n. pelta, tergites II – III; (19) crassusensus tergites II – IV; (20) fialae sp. n. pelta, tergites II – III; (21) indicus (nesius holotype) tergites II – III; (22) indicus Syntype tergites II – IV; (23) indicus from Mo’orea, pelta, tergites II – III; (24) franae sp. n. tergites II – III. Pelta and tergites II – III 25 – 29: (25) eriae sp. n.; (26) longicollis; (27) macarangai; (28) utae sp. n.; (29) reuteri. Male pseudovirga 30 – 33: (30) fialae sp. n.; (31) longicollis; (32) macarangai; (33) reuteri.

FIGURES 1 – 6. Dolichothrips species, head & pronotum. (1) chikakoae sp. n.; (2) crassusensus; (3) eriae sp. n.; (4) reuteri; (5) longicollis; (6) franae sp. n.