Lucilia

Whitworth, Terry, 2010, Keys to the genera and species of blow flies (Diptera: Calliphoridae) of the West Indies and description of a new species of Lucilia Robineau-Desvoidy, Zootaxa 2663, pp. 1-35 : 18-19

Key to the species of Lucilia of the West Indies

1. Three postsutural acrostichal setae; abdomen usually with apparent mesal division in which one half is microtomentose, the other half shining when viewed from a sharp angle laterally........................................................................2

- Two postsutural acrostichal setae; abdomen usually uniformly metallic or microtomentose ...................................... 3

2. Central occipital area with single seta just below inner vertical seta ( Whitworth 2006, fig. 73); abdomen dull coppery; humeral callus with two or three small setulae along posterior margin ( Whitworth 2006, fig. 74); metasternum bare; frons of male broad, much broader than width of parafacial at level of lunule, 0.20 (0.19–0.21) of head width; male genitalia (under Phaenicia pallescens ) as in Hall (1948, fig. 24, J–M)................................................ L . cuprina

- Central occipital area with two to five setae below inner vertical seta ( Whitworth 2006, fig. 73); abdomen usually bright green, occasionally shining coppery; humeral callus with six to eight small setulae along posterior margin ( Whitworth 2006, fig. 74); metasternum setose; frons of male narrower, about equal to width of parafacial at level of lunule, 0.13 (0.12–0.14) of head width; male genitalia as in Hall (1948, figs. 25 F, G); reported only from Bermuda. ....................................................................................................................................................................... L . sericata

3. Fifth abdominal tergite coppery or aeneous (not always obvious, especially in some females); postocular area golden; body dark blue, sometimes with purple highlights; upper calypter white, lower calypter tan in both sexes;

basicosta tan; anterior abdominal tergites with tomentum including outer edges of T4, the remainder polished; known only from Jamaica.......................................................................................................................... L . lucigerens - T5 usually not distinctly colored in contrast to other tergites; without above combination of characters. ................. 4

4. Rear half of gena with several to many pale setae in front of postgena ( Fig. 35 ) (note the postgena has pale setae in all Lucilia in the region)................................................................................................................................................ 5

- Rear half of gena with only dark setae (rarely a few pale setae are found on rear edge of gena, not extending forward) ............................................................................................................................................................................. 6

5. Basicosta usually tan, sometimes light tan to orange. Rear edge of T3, all of T4 and T5 polished when viewed from rear ( Fig. 36 ); male frons narrow, about 0.03 of head width, much narrower than width of first flagellomere. ............ ............................................................................................................................................................................. L . rica

- Basicosta usually pale yellow or orange. Anterior third or more of T4 with whitish microtomentum, rest of T4 and T5 polished ( Fig. 37 ); male frons much broader, about 0.10 of head width, broader than width of first flagellomere. .......................................................................................................................................................................... L . cluvia

6. Basicosta pale orange, yellow or whitish...................................................................................................................... 7

- Basicosta darker, tan to black or sometimes orange-brown .........................................................................................9

7. Body color metallic-tan, appearing somewhat teneral; abdominal tergites all microtomentose; known only from six specimens from Bermuda, possibly extinct ........................................................................................... L . problematica

- Body color shining green, blue, or violet; T5 shining with no microtomentum...........................................................8

8. Thorax green or blue, abdomen bluish-purple; T4 and T5 polished; male lower calypter dark brown; setae behind postocular row of setae weak and pale; surstyli broad, usually curved sharply inward ( Figs. 48–49 ); known only from Bahamas, Cuba, Cayman Islands and Dominican Republic............................................................. L . retroversa

- Thorax and abdomen normally concolorous brilliant green; only rear edge of T4 and all of T5 polished; male lower calypter light tan; one irregular row of black setae behind postocular row; surstylus long and slender ( Figs. 40–41 ); listed from Cuba by James (1970), primarily southern USA, possibly introduced elsewhere ........... L . coeruleiviridis

9. Upper and lower calypters gray to tan in both sexes; postocular area golden in good specimens, varying from faint to bright yellow; area may be darkened in poor specimens. Male frons narrow, 0.02 head width, usually less than width of median ocellus; male genitalia as in Figs. 44–45 ; known only from Puerto Rico, St. Vincent, Dominica and St. Lucia................................................................................................................................................................ L . fayeae

- Upper calypter pale both sexes, lower calypter brown in male and whitish in female; postocular area usually bright silvery. Male frons broader, 0.03–0.05 head width, usually wider than median ocellus; male genitalia as in Figs. 42– 43................................................................................................................................................................................. 10

10. Most or all of abdominal T4 polished when viewed from rear; throughout the West Indies ......................................... .................................................................................................................................... West Indies variant of L. eximia

- Only rear half of T4 polished when viewed from rear; Trinidad and mainland areas (North, South and Central America)................................................................................................................................... Mainland variant of L. eximia

Figures

FIGURES 35 – 37. Lucilia characters. 35. L. cluvia, pale setae on rear of gena. 36. L. rica, tomentum pattern on abdomen. 37. L cluvia, tomentum pattern on abdomen.

FIGURES 38 – 49. Left lateral and posterior views of Lucilia male genitalia. 38, 39. L. cluvia. 40, 41. L. coeruleiviridis. 42, 43. L. eximia. 44, 45. L. fayeae. 46, 47. L. lucigerens. 48, 49. L. retroversa.