CAPRIMULGI 



237 



in the annexed cut (fig. 110). Steatornis, as will be seen 

 (fig. 117), hardly differs, and Podargus agrees with it. In 

 Mgotlieles there is a slight difference in that there is hardly 

 any trace of the wristward branch of the tendon. Steatornis 

 has an expansor secundariorum, apparently absent among 

 the other genera. The muscle is attached to the teres by its 

 long tendon. The insertion of the deltoid is extensive, and 

 it receives a tendon from the scapula. In many Caprimul- 

 gidae the biceps is split for some distance before its insertion,, 

 the bifidity even invading the muscle itself and not being 



FIG. 116. PATAGIAL MUSCLES OF 

 Caprimulcjus (AFTEK GAEKOD). 



rf, de'.toid ; b, biceps ; h, Immerus ; tpb, ten- 

 sor patagii brevis ; ecr, extensor carpi radialis. 



FIG. 117. CORRESPONDING MUSCLES- 

 OF Steatornis, BUT OF LEFT WING 

 (AFTER GAEROD). 



/, triceps. Other letters as in fig. 11G. 



limited to its tendon. In Podargus FURBRINGER describes 

 a special slip of rhomboideus profundus, arising separately 

 from ilium. The anconceus has a tendinous humeral head. 

 In the thigh the muscle formula is either AXY (most Capri - 

 mulgi) or XY (Steatornis). The tibialis antic its tendon of 

 Podargus is double. The glutaeus I. extends over biceps in 

 Nyctidromus, &c., not in JEgothelcs. No glutaeus V. There 

 are sometimes both and sometimes only one of the two 

 peroneals present. In Steatornis and JEgothdes only the 

 brevis is to be found, in Nyctidromus only the longus ; in 

 Podargus both. 



