Common brown lemur, Eulemur fulvus "Red-fronted Brown Lemur" by Wallygrom (back home!) via Flickr, Creative Commons Attribution ShareAlike.	Black lemur, Eulemur macaco "Up a tree" by Hello, I am Bruce via Flickr, Creative Commons Attribution ShareAlike.
Golden bamboo lemur, Hapalemur aureus "Golden Bamboo Lemur, Ranomafana National Park" by Gripso_banana_prune via Flickr, Creative Commons Attribution ShareAlike.	Ring-tailed lemur, Lemur catta "Catta Lemur" by Pixelblume via Flickr, Creative Commons Attribution ShareAlike.
Greater bamboo lemur, Prolemur simus "Hapalemur simus (Greater Bamboo Lemur)" by Wallygrom (back home!) via Flickr, Creative Commons Attribution ShareAlike.

Taxonomy:

White-headed lemur, Eulemur albifrons (Add)
Gray-headed lemur, Eulemur cinereiceps (Add)
Collared brown lemur, Eulemur collaris (Add)
Crowned lemur, Eulemur coronatus (Add)
Blue-eyed black lemur, Eulemur flavifrons (Add)
Common brown lemur, Eulemur fulvus

Black lemur, Eulemur macaco

Mongoose lemur, Eulemur mongoz (Add)
Red-bellied lemur, Eulemur rubriventer (Add)
Eulemur rufifrons (Add)
Red lemur, Eulemur rufus (Add)
Sanford's brown lemur, Eulemur sanfordi (Add)

Lac Alaotra bamboo lemur, Hapalemur alaotrensis (Add)
Golden bamboo lemur, Hapalemur aureus

Eastern lesser bamboo lemur, Hapalemur gilberti (Add)
Eastern lesser bamboo lemur, Hapalemur griseus (Add)
Southern lesser bamboo lemur, Hapalemur meridionalis (Add)
Western lesser bamboo lemur, Hapalemur occidentalis (Add)

Ring-tailed lemur, Lemur catta

Pachylemur insignis (Add)
Pachylemur jullyi (Add)

Greater bamboo lemur, Prolemur simus

Red ruffed lemur, Varecia rubra (Add)
Black-and-white ruffed lemur, Varecia variegata (Add)