2G0 Repokt of the Entomot.ogists of the 



little larger than the point of an ordinary pin. As seen by the 

 aid of a microscope or good hand lens, it is found to vary in 

 shape from a perfect ellipse to an oval, and is not as pointed as 

 the egg of the corn root worm( Diahrotica longicornis) , as shown 

 by illustration of the latter as given by Dr. Forbes.^^ They have 

 the same pentagonal markings as have the eggs of the D. longi- 

 cornis. The eggs average 0.69 mm. long and 0.48 mm. wide. 



Larva. — The larva, or " grnb," would be described by a farmer 

 as a small white wire-worm with a dark brown head and tail; it 

 being hard to tell which end is head and which is tail. In shape, 

 they are nearly cylindrical, about one-thirty-second of an inch 

 wide and varying from one-fourth to five-eighths of an inch in 

 length. With the exception of the head, first segment back of 

 the head and the anal plate, which are dark brown, the body is 

 pure white. The head-end can be distinguished by the fact that 

 the head is only about one-half as wide as th;e body. The anal^ 

 plate is as wide as the body, darker colored than the head, in fact, 

 nearly black at the margin. The above are the only characters 

 to be seen without the aid of a hand lens. With- the latter, the 

 anal plate will be found to have two minute, upturned teeth on 

 its posterior margin. A few scattering hairs can also be seen. 

 Six small thoracic legs will be found near the head, and one pro- 

 tractile proleg will be found on the ventral side of the anal plate. 



Pupa. — During part of the pupal or resting stage, the striped 

 beetle is nearly pure white in color. The peculiar shaped wing 

 pads and folded legs are the most conspicuous part of its body. 

 A few scattering hairs can be seen by the aid of a lens. 



PAEASITES. 



Dipterous. — The dissections show that old beetles, taken during 

 the latter part of July and during August and September, were 

 frequently parasitized with the maggot of a tachinid fly. The eggs 



11 Twelfth Report of State Ent. 111., 1882: 18. 



