Kohlsia

Acosta, Roxana, Salceda-Sánchez, Beatriz & Ponce-Ulloa, Hugo E., 2009, Two new species of fleas of the genus Kohlsia Traub, 1950 (Siphonaptera: Ceratophyllidae) from Mexico, Zootaxa 2224, pp. 60-68 : 67

Key to the Mexican species of Kohlsia

1. Acetabular region with one long bristle........................................................................................................................ 2

- Acetabular region with more than one long bristle....................................................................................................... 3

2. Crochet with a projection ............................................................................................................................. K. fournieri

- Crochet without projection ................................................................................................................................. K. linni

3. Postantennal region with four rows of bristle............................................................................................................... 4

- Postantennal region with three rows of bristles ........................................................................................................... 5

4. In males, three antesensilial bristles, uppermost very tiny; movable process almost as long as wide .......... K. martini

- In males, two antesensilial bristles, uppermost about three times as long as ventralmost, near to the uppermost a tiny bristle; movable process at least one and a half times longer as wide ........................................... K. zyanya sp. nov.

5. With 9–10 spines in pronotal comb; four stout and long setae at the posterior margin of the movable process; sternite VIII well developed .................................................................................................................. K. ahuacatlan sp. nov.

- With more than 11 spines in pronotal comb; three stout and long setae at the posterior margin of the movable pro- cess; sternite VIII variable in shape, not hyperdeveloped ........................................................................................... 6

6. Distal arm of sternite IX bilobed bearing one bristle.................................................................................................... 7

- Distal arm of sternite IX not bilobed ............................................................................................................................ 8

7. Sternite VIII large, club-shaped process, apex bearing 5 ventromarginal bristles and two long medial bristles, dorsal margin with a hump, margin proximoventral dentate; distal arm of sternite IX with prominent ventral lobe with four stout marginal bristles and the apical lobe very markedly rounded and three very stout short setae ........... K. keenani

- Sternite VIII variable in shape, number and position of bristles, usually broad and short, with two-three apical bris- tles and three-five medial; distal arm of sternite IX with apical lobe bearing three stout marginal spiniform setae .... ....................................................................................................................................................................... K. mojica

8. Preantennal region with four rows of bristles; distal arm on sternite IX slender near to apex; apex of sternite VIII subtruncated, with two stout ventromarginal bristles and a patch of about ten very long and slender bristles; fixed