Chrysanthrax Osten Sacken

Evenhuis, Neal L., 2017, A new species of Chrysanthrax Osten Sacken (Diptera: Bombyliidae) from Costa Rica parasitic on an ant lion (Neuroptera: Myrmeleontidae), Zootaxa 4363 (4), pp. 583-588 : 588

Key to Central American species of Chrysanthrax Osten Sacken

1. Scutellum all black, no reddish ground color dorsally......................................................... 2

-. Scutellum with some reddish ground color dorsally on scutellum............................................... 4

2. Abdomen with white tomentum along posterior margin of tergites appearing as transverse bands...... C. cerius (Williston)

-. Abdomen without white tomentose bands.................................................................. 3

3. Thorax and abdomen with all yellow pile laterally; abdominal tergite I with distinct red spot laterally.... C. cypris (Meigen)

-. Thorax and abdomen with black pile laterally, no yellow pile; abdominal tergite I black......... C. pennyi Evenhuis , n. sp.

4. Abdomen with large patch of white tomentum dorsolaterally on tergites II –V.................... C. argentosus (Painter)

-. Abdomen without such large patch of white tomentum........................................................ 5

5. Basal third to half of wing infuscated dark brown to black, with sharp demarcation between infuscation and hyaline portion of wing................................................................................................ 6

-. Basal wing infuscation not as extensive, tan to brown, and often with spots in distal portion of wing.................... 8

6. Hyaline portion of wing without spots..................................................................... 7

-. Hyaline portion of wing with spots................................................... C. sackeniana (Williston)

7. Tergites I –IV all yellow pilose......................................................... C. astarte (Wiedemann)

-. Tergites II –IV with black hair and tomentum laterally........................... C. panamensis Evenhuis & Greathead

8. Front all yellow pilose and tomentose......................................................... C. edititius (Say)

-. Front with black hairs, a few yellow hairs may be intermixed................................................... 9

9. Spot of dark infuscation present at base of R4 and on crossvein closing cell dm..................... C. gorgon (Fabricius)

-. No infuscation at base of R4 and/or crossvein closing cell dm................................... C. fuscus (Fabricius)