A new species of Chrysanthrax Osten Sacken (Diptera: Bombyliidae) from Costa Rica parasitic on an ant lion (Neuroptera: Myrmeleontidae) Author Evenhuis, Neal L. text Zootaxa 2017 2017-12-13 4363 4 583 588 journal article 31175 10.11646/zootaxa.4363.4.11 63e22a0c-a433-4d6a-97fc-d16d175fb3fd 1175-5326 1114737 409E6B7A-BC4F-47A0-B395-9AC9702B4BFC 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)