From Anthony Claytons Paths of Glory: Each cav. Div. consisted of 3 brigs of 2 regts., a groupe of 2 or 3 75mm horse artillery batteries, a 350-strong groupe cycliste and, in theory, an aircraft reconnaissance squadron. Regts comprised 4 squadrons (expanded to 6 in army corps units on mobilisation), and on war establishment totalled 35 officers and 734 troopers. There were 12 cuirassier-, 32 dragoon-, 21 chasseur-, 14 hussar- and 6 chassuers dAfrique regts the latter producing 1 regt de marche in 1914 [if that contradicts Osprey, too bad!]. Horses purchased for the cavalry were not the most suitable; selection being made according to budgetary and agricultural considerations an economy to prove false in 1914 when large nos of horses died.
That's exhausted my references.
-- Edited by Excelsior1 on Wednesday 20th of February 2013 10:23:05 PM
Not found much, but the Osprey "French Army" book (Ian Sumner) has the following:
Cuirassiers: 1914 - 12 regts cuirassiers, organised into 2 brigades of 2 regts serving in the 1e, 3e, 4e, 6e 7e & 9e cav. div's. - from Nov '14 each cav. brigade formed a Light Group of several squadrons drawn from its constituent regts & attached cyclists. These were in fact infantry units; those drawn from cuirassiers were called "cuirassiers a pied". From 1916, 6 mounted regts (4e,5e,8e,9e,11e,12e) were formally organised as infantry.
Dragoons: 32 regts employed in different cav. div's; also organised into brigades of 2 regts, forming a div. with either a brigade of cuirassiers or a 2nd brig. of dragoons (2e,5e,8e & 10e div's).
Chasseurs a cheval: 21 regt's, forming part of the light cavalry arm. The light brig. in each of the 2e to 8e cav. div's; 2e to 5e had 2 chasseur regt's, those of 6e to 8e had a regt of chasseurs and a regt of hussars. The remaining retgs were largely dispersed and served as corps or div. cavalry. Where possible the four pre-war regular squadrons formed the corps of cav., whilst the 5e & 6e squadrons (formed from reservists on mobilisation) were div. cav. reserve squadrons of those light regts serving in cav. div's functioned as div. cav. with reserve & territorial div's (!).
Hussars: The 14 hussar regts formed the other element of light cav. 3e & 4e cav. div's eahc had alight cav. brigade of 2 regts of hussars; the remainder served as div. or corps cav.
Hope that helps...! If I find anything smaller, I'll put it here.