306 Journal New York Entomological Society. [Vol. xxiv. 



quam duple et dimidio (J*) vel solum circiter duple ($) longiere et 

 margini basali pronoti aequelengo ((^) vel hoc saltern 1/4-1/3 breviore 

 (5) ; pronoti latitudine basali circiter 1/3-2/5 breviore, sat crebre, 

 fortiter punctato, strictura apicali versus latera gracilescente callis 

 tertiam apicalem partem baud superantibus, lateribus apicem versus 

 distincte calloso-marginatis, intra marginem longitudinaliter impres- 

 sis; scutello paullo subtilius punctato; hemielytris abdomen longe 

 superantibus, marginale costali modice rotundatis, crebre punctatis. 

 Long. 5, lat. 2 i/io (^)-2 1/2 ($) mm." 



In the same article, there also appears brief discriptions of the 

 varieties palmeri, plagiata, signata, scutellaris. 



MISCELLANEOUS NOTES. 



Some Respiratory Structures of Dragonfly Larvae. — In the little 

 Zygoptera or damsel flies, the respiratory arrangement is vastly dif- 

 ferent from that of other dragonflies. These nymphs all have three 

 big flat external gills, forming a sort of triple tail at the end of the 

 abdomen. But what is most strange is that these nymphs will live 

 if the external gills are all broken off. I could find nothing in the 

 way of discovered fact about these insects except the old statement 

 that the blackwing, Calopteryx, had as a nymph three gills in his 

 rectum. I dissected four of the common small Agrionidse, includ- 

 ing the common brown Lestes, blue Enallagma and others. Their 

 rectum was the same as that of any insect, with just three glands in 

 it; but in Argia putrida, I happened to work further forward, and 

 in this creature I found that the intestine, just caudad of the Mal- 

 pighian tubules, is expanded into a globular ampulla. On the sur- 

 face of this ampulla are three fatty bags, well tracheated, one of 



