no REPORT OF NEW JERSEY STATE MUSEUM. 



Sub-family 



TR1OZA Forst. 



T. diospyri Ashm. Anglesea V, 28 (Sm); common on persimmon every- 



where (Sz). 

 T. tripunctata Fitch. Staten Island X, 31 (Ds) ; Anglesea V, 28 (Sm); 



common, the imago frequently met with in winter on pine trees (Sz). 



Family APHIDID^E. 



The "plant-lice," "green-flies" or "aphids" are among the commonest 

 and most abundant of all our insects, and also among the most destructive. 

 They have, when winged, two pairs of transparent wings, the anterior 

 much the larger; but some species and some forms of nearly all species 

 never develop wings at all. The bodies are plump, oval, with usually a 

 pair of "honey tubes" or "cornicles" near the anal end, a pair of long 

 antennae and rather long sprawly legs. They frequently cluster in great 

 numbers about twigs or shoots of plants or on the under surface of leaves, 

 sucking the juices and excreting from the anal end a thin sugary liquid, 

 the honey dew. This honey dew when present in quantity tends to choke 

 the leaves upon which it falls, and that tendency is furthered by a black 

 soot fungus which develops on the honey dew and disfigures and some- 

 times checks the growth of fruits as well as leaves. 



Fig. 43/ Wheat plant louse; much enlarged. 



The life history of the species is interesting and sometimes compli- 

 cated; but briefly stated is generally about as follows: They winter as 



