1. Lice with head wider than thorax and chewing mouth parts .......... Damalinia (Bovicola) sp.
2. Lice with head narrower than thorax and piercing mouth parts .......... Go to: 3 & 4

3. All tarsal claws are equal in size .......... Haematopinus sp.
4. First pair of tarsal claws are smaller than other 2 pairs .......... Go to: 5 & 6

5. "Nose" short, single row of setae per abdominal segment .......... Solenoptes sp.
6. "Nose" long, more than one row of setae per abdominal segment .......... Linognathus sp.