52 Annals Entomological Society of America [Vol.11, 



tracheoles to the internal, lateral and caudal portions of the gan- 

 glion, but not much to the connective. The right corresponding 

 branch, however, is large and besides supplying tracheae to the 

 ganglion gives off two main parts which supply the caudal con- 

 nectives. 



Variations from the above description were found in other 

 individuals studied. In some the supply to the ventral connec- 

 tives were symmetrical, or chiefly from the left side. The supply 

 of the cephalic connectives although more uniform was some- 

 times less symmetrical. And the cephalic connectives were often 

 supplied at their origin by branches from a number of svstems. 

 (Fig. a and 5.) 



As in previous ganglia the nerx'es were each supplied by 

 usually one small branch, each from the nearest tracheal system. 

 The distribution of the smaller tracheoles was much like that 

 in the first thoracic ganglion. 



THIRD THORACIC. 



The tracheal supply is much the same in this as in the pre- 

 vious ganglion. 



In the specimen of the series most described as a basis for the 

 larger branches, the left hand caudal branch instead of the right 

 hand one furnishes most of the connective supplv. (Fig. D, and 

 0.) 



FIRST ABDOMINAL. 



In the thoracic ganglia, the ventral trans\-erse tracheal 

 branch which sends out two tracheae to each ganglion crosses 

 above or cephalic to the ganglia. The transverse tracheal 

 branches supplying the next seven, cross caudal to the ganglia 

 which they supply. 



The first abdominal ganglion is much like the others in its 

 main branches. In the series most described and figured the 

 cephalic connective supply is symmetrical, the caudal supply 

 mostly from the left. In other specimens mostly from the right 

 with now and then a slightly less symmetrical distribution in the 

 cephalic region. This ganglion and the following show a more 

 definite lateral localization of the fine branches. (Fig. D and 7.) 



S?:COXI) ABDOMINAL. 



Similar to the first. The main trunks come to it more medi- 

 ally. On the right side of the one of the series, the lower or cau- 

 dal connective is the larger. (Fig. 8.) 



