Key to the species of Huascaromusca

1 Anterior spiracle with transverse opening without a dorsal dilatation; T5 with scattered, thin and long discal setae (Fig. 19 A, C)............................................................... H. carvalhoi (Wolff et al., 2013), comb. nov.

- Anterior spiracle with transverse opening with a dorsal, circular dilatation; T5 with a row of discal setae (Fig. 19 B, D).....2

2 Subcostal sclerite ciliate................................................................................3

- Subcostal sclerite bare................................................................................. 4

3 Presutural acrostichal setae absent and dorsocentral setae 2:2............. H. cordillera Wolff & Ramos-Pastrana, sp. nov.

- Presutural acrostichal setae present and dorsocentral setae 2:3............................. H. volgelsangi Mello, 1967

4 General color of the body black, with light blue metallic reflections; mesonotum without longitudinal vittae; pleura and abdominal segments black; acrostichal setae 0:0 or 2:1....................................................... 5

- General color of body orange or brown; mesonotum brown or black with 3 or 4 longitudinal vittae of whistish pollen; pleura and syntergite 1+2 orange; acrostichal setae 0:1............................................................. 8

5 Presutural acrostichal setae absent; humeral setae 2.......................................... H. lara Bonatto, 2005

- Presutural acrostichal setae present; humeral setae 3..........................................................6

6 Legs yellow-orange; suprasquamal ridge bare.......................................... H. decrepita (Séguy, 1925)

- Legs dark chestnut; suprasquamal ridge bare or with sparse, fine hairs........................................... 7

7 Anterior spiracle pale; suprasquamal ridge bare.......................................... H. uniseta (Aldrich, 1925)

- Anterior spiracle dark chestnut or black; suprasquamal ridge with sparse, fine hairs................................................................................................................. H. obscura Wolff, sp.nov.

8 Thorax orange, mesonotum black with bluish metallic reflections; katepisternal setae 1+2...... H. semiflava (Aldrich, 1925)

- Thorax brown or brownish red, mesonotum brown; katepisternal setae 1+1.......................................9

9 Presutural acrostichal setae present............................................ H. aeneiventris (Wiedemann, 1830)

- Presutural acrostichal setae absent.......................................................................10

10 Thorax brownish-red; scutellum with discal, prebasal and subapical setae.................. H. purpurata (Aldrich, 1922)

- Thorax shining black; scutellum lacking discal, prebasal and subapical setae................. H. bequaerti (Séguy, 1925)