114 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



and the queen (E) by a muscle {187) from spiracular plate of seg- 

 ment VIII to quadrate tergal plate of segment IX. 



188. Lateral internal dorsal muscle of abdominal segment VIII. — 

 Absent in the male, perhaps represented in the worker (fig. 28 C) 

 and the queen (E) by a muscle {188) from upper angle of spiracular 

 plate to posterior dorsal angle of quadrate plate of segment IX (fig. 

 31 B). 



i8g. Occlusor of the spiracle of abdominal segment VIII (fig. 

 28 C, E). — A short intraspiracular muscle. 



ipo. Dilator of the spiracle of abdominal segment VIII (fig. 28 C, 

 E). — In the worker and the queen the dilator of the spiracle of 

 segment VIII arises in the ventral anterior angle of the tergal spiracu- 

 lar plate, not on the sternum as in preceding segments. 



jpi. Lateral muscle of abdominal segment VIII (fig. 29 B, D).— 

 Present in the male only, apparently represents the second tergo- 

 sternal muscle of preceding segments. 



ip^. Tergovalvifer muscle of abdominal segment VIII. — Present 

 in the female only, arising on posterior ventral angle of spiracular 

 plate (fig. 28 C, E), goes anteroventrally to insertion on dorsal margin 

 of triangular plate (first valvifer) of sting (fig. 31 D). 



ipj, ip4. Tergovaginal muscles of abdominal segment VIII. — Two 

 slender muscles present in the queen only, arising on anteroventral 

 part of spiracular plate (fig. 28 E), inserted on dorsal wall of vagina 

 (D). 



19^. Lateral internal ventral muscle of abdominal segment VIII 

 (fig. 29 B, D). — A short muscle present in the male only, arising 

 laterally on sternum VIII, inserted on lateral angle of parameral plate 



ig6. Levator of the shaft of the sting (fig. 31 B, C). — A small 

 muscle arising on middle of ramus of stylet, inserted on small process 

 (C, g) of base of stylet bulb a short distance beyond hinge (h) be- 

 tween ramus and bulb. 



ip/. Depressor of the shaft of the sting (fig. 31 B). — A large 

 muscle arising posteriorly on oblong plate of sting, curving anteriorly 

 and dorsally over base of stylet bulb to insertion on furcula (Frc). 

 A small branch of this muscle is described by Rietschel (1937, No. 

 ipb) as arising laterally on the oblong plate. 



ip8. Protractor of the lancet of the sting (figs. 31 B, 32 C). — A 

 large muscle of two parts attached posteriorly on outer and inner 

 surfaces of upper, apodemal part of quadrate plate ; attached anteriorly 

 on anterior end of oblong plate at base of second ramus {^r). Pulls 

 the quadrate plate forward, depresses the triangular plate, and pro- 



