THE CANADIAN ENTOMOLOGIST 33 



nearly the caudal half. The last, 7th, ganglion is longer than wide, with a 

 slight median transverse constriction, and evidently composite. 



Callopistria floridensis Gn. 



The connectives between the suboesophageal and the 1st thoracic are short 

 and widely separated. Those between the thoracic ganglia are widely separated 

 for the entire length. The median nerve branches about one-third the distance 

 behind the ganglion. The lateral nerves of the connectives are pushed backivards 

 so that they arise from the base of the connective as it leaves the ganglion, and there- 

 fore appear almost to arise from the fro7it angle of the ganglion itself. The con- 

 nectives between the third thoracic and the first abdominal are short and sep- 

 arated on the caudal third. The remaining abdominal connectives are slender, 

 elongate, entirely fused on the cephalic four-fifths, and distinctly separated 

 on the caudal fifth. The median nerves in the abdomen are very slender, 

 degenerate, separating shortly before the ganglion, passing caudad and laterad 

 for a short distance with the first ganglionic nerve of its side. The last two 

 ganglia are united to form an elongate mass, and this is separated from the 

 preceding ganglion by separated connectives not quite so long as the caudal 

 ganglionic mass. 



Eiixoa ochrogaster Gn. 



The connectives between the suboesophageal and the 1st thoracic ganglia 

 are short but separated. The connectives between the thoracic ganglia are 

 entirely separated, and divided by the oblique muscles. The lateral nerves 

 from the connectives are close to the ganglia, those from the first pair arising 

 at the base of the connectives as they leave the second thoracic ganglion, and 

 those from the second pair arising a very short distance in front of the third 

 thoracic ganglion. The median system is highly developed in the thorax. 

 The connectives between the third thoracic and the first abdominal ganglion 

 are less than twice as long as the ganglia and separated for almost the entire 

 length. The remaining abdominal connectives, except the last pair, are fused 

 except for a short distance, about one-sixth the length, immediately cephalad 

 of the ganglia. The last pair of connectives are hardly longer than the last 

 ganglionic mass and are separated for more than the caudal half of their length. 

 The last ganglion is longer than wide and evidently represents the 7th, 8th 

 (and 9th) very completely fused. A delicate pair of nerves arise from the 

 caudal part of the dorsal face, representing the median nerves of the last seg- 

 ment. 



MeometridcB. 



A geometrid was dissected, an alcoholic specimen of uncertain species. 

 The connectives in the abdomen are more closely united than in most others, 

 and approach the condition found in S. thule. 



The connectives between the suboesophageal ganglion and the 1st thoracic 

 are short, hardly longer than the 1st ganglion but quite distinctly separated. 

 The connectives between the three thoracic ganglia are separated for almost 

 the entire length, lying side by side for less than a fifth the length behind each 

 ganglion. The median nerves are well developed as are the lateral nerves of 

 the connectives, which arise a short distance in front of the ganglia. The 

 abdominal connectives are thoroughly fused on the cephalic four-fifths of their 

 length, forming a simple cord, but are distinctly though slightly separated for 



