42 PROCEEDINGS MANCHESTER INSTITUTE 



GROUP I. Cursoria or Runners. 

 FAMILY I. Blattidae or Cockroaches. 



1 Blatta gernianica Fabricius. 



2 Periplaneta aniericana Fabricius. 



3 Pycnoscelus obscurus Scudder. 



B. gernianica is a foreign species, commonly known as the 

 " Croton Bug," from its having been first observed about the Cro- 

 ton aqueduct in New York city. Though introduced from Europe 

 it is everywhere abundant. This species requires several months 

 to reach maturity, and structurally has attained some degree of 

 specialization, but it is notoriously unpopular and the best that 

 can be said of it is that it is a good destroyer of bed-bugs, which 

 abound in tenement districts and on ship-board. 



P. americana is commonly distributed about our fields and ap- 

 pears identical with the well-developed species found about our 

 mills. 



P. obscitrns is a wingless species which is also common. 



GROUP II. Anibiilatoria or Walkers. 

 FAMILY 2. Pliasniiclte or Walking- Sticks. 



1 Diaplieroniera femorata Say. 



The Phasmidae are represented in our vicinity by a single gen- 

 us, and during the past summer but few specimens have been 

 found. One of these, however, was of unusual size, measuring 

 fully six inches, including length of body and antennae, 



GROUP III. Sanatoria or Junipers. 



FAMILY 3. Acrididae or Locusts — Sliort-liorned 

 Grasshoppers. 



I. SUB-FAMILY Tryxalinte. 



1 Chloealtis conspersa Harris. 



