Vol. XXvii] ENTOMOLOGICAL NEWS. 23 



vance here presented will do away with most such difficulties 

 coleopterists experience. After the collector becomes ac- 

 quainted with the apparatus, it will render itself indispensable 

 to him. xA.s everyone knows, collecting small Coleoptera is a 

 difficult task because most of them are swift runners. INIany 

 rare specimens are lost for this reason, and even if captured 

 are often injured. This suction-pump collector is especially 

 adapted for class studies, because it is easily carried in the 

 vest pocket and because it enables one to observe the speci- 

 mens at the time of capture. 



The apparatus is shown in the accompanying figures : ^ is a 

 cork with center hole ; B, a glass tube four inches long, one 

 and one-eighth of an inch in diameter, and one-eighth of an 

 inch thick ; C, cork of type similar to A; D, glass tubing bent in 

 S-shape ; this curve is very important because it destroys a 

 straight path for insects and dust ; B, glass tubing one-fourth 

 of an inch in diameter with enlarged edges on both sides of 

 the cork ; F, rubber tubing which is of the desired length, 

 (usually 20 to 30 inches), with mouthpiece on one end, the 

 other is slipped over the glass near the cork ; G, short piece 

 of rubber tubing which prevents the glass tube from breaking 

 whe^n insects are collected on or around solid objects and in 

 crevices ; H, silk netting which is stretched over the end of the 

 tube and tied with thread sealed with wax in order to prevent 

 it from fraying ; this netting prevents the entrance of dust 

 particles into the tube. 



The end of the rubber tube G is placed near the objects 

 desired, such as small beetles, shells, or any small specimens, 

 which are then drawn into the main chamber through the glass 

 tube D, by the suction which is created by a sharp inhalation 

 at the end of the rubber tube F. 



Specimens in the main chamber can be emptied into a 

 cyanide jar by removing the bottom cork C, which is only 

 partly pushed into the tube for about one-third of its length. 



A Correction (Hym.). 



Both specimens of Mutilla slossonac Fox mentioned by me, Ent. 

 News, xxvi, p. ^i?! January, 1915, are males. — Geo. M. Greene, Phila- 

 delphia, Pa. 



