l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO7 



i6j. First episternal promofor of the coxa (fig. 46). — Very broad, 

 flat muscle which originates on the anterior margin of the epi- 

 sternum and goes ventrally to the anterior edge of the ventral 

 W3.\\ of the coxa, between the epimeral and trochantinal 

 articulations. 



168. Second episternal promotor of the coxa (figs. 47, 48). — Origin 

 on the posterolateral portion of the episternum and the under 

 surface of the pleural ridge and pleural arm ; insertion on apo- 

 demal tendon attached to a small plate near the edge of the coxa 

 and the coxo-pleural articulation. 



i6p. Subalar muscle of the hind wing (figs. 37 to 42). — Powerful 

 muscle which originates on the meron and goes upward and for- 

 ward to insert on the subalar plate {Sa). Corresponds to the 

 depressor-extensor of the wing in other insects. 



lyo. First sternal muscle of the coxa (figs. 40 to 43). — Slender 

 muscle. Origin on the end of the sternal arm. Insertion on the 

 ridge which limits the meron, very close to the coxo-pleural 

 articulation. Probably acts on rotator or rotator-adductor of 

 the coxa. 



lyi. Second sternal muscle of the coxa (figs. 40, 41, 42). — Flat mus- 

 cle, from a broad origin on the posterior edge of the sternal arm, 

 goes to its insertion on the ridge which limits the meron. Prob- 

 ably acts as rotator or rotator-adductor of the coxa. 



1^2 . Sternal remotor of the coxa (figs. 41, 42, 43). — Broad, flat, 

 short bundle of fibers which originates on the posterior edge of 

 the sternal arm and inserts on the posterior (dorsal) part of 

 the coxal rim. 



//J. Spinal muscle of the coxa (fig. 54). — Very slender and long 

 bunch of fibers. Origin on the second spina. Insertion on an- 

 terior wall of the coxa, between i8ib and i8ic. Acts probably 

 as adductor and rotator. 



1/4. First tergal remotor of the coxa (figs. 37, 38, 39) . — Flat muscle, 

 originates on the anterior part of the tergum, goes dorsally to 

 the posterior part of the coxal rim. 



i/^. Second tergal remotor of the coxa (figs. 37, 38, 39). — Origi- 

 nates on the anterior part of the tergum, goes dorsally under- 

 neath 1/4 to insert on the posterior part of the coxal rim. 



776. Third tergal remotor of the coxa (figs. 37, 38, 39). — Powerful 

 muscle, originates on the anterior part of the tergum, inserts on 

 the posterior part of the coxal rim. 



777. Main depressor of the leg (figs. 2)7 to 46). — The most powerful 

 muscle of the leg and metathorax. It has several origins on dif- 



