Page:The Scientific Monthly vol. 3.djvu/392

 386

��THE SCIENTIFIC MONTHLY

��ing plant tissue^ many of which are of direct interest to the agricnl- turist^ will be found in the sixth group, the insect parasites in the seventh and the beneficial plant feeders or poUenizers in the eighth. It would be possible of course to include in the eighth group, certain members of the Diptera, Goleoptera and Lepidoptera which as adults serve a useful purpose as poUenizers, but, on the whole, such species have other predominating larval habits which overshadow the bene- ficial ones of the adults.

Table I. shows how the different orders are represented in each group.

TABLE I

��Order

��Thrsanara

Ephemerida

Pieooptera

Mallophaga.

Ifloptera

Corrodentia.

Platyptera

Nearoptera

Mecoptera

Trichoptera. ,

Odonata

Thjsanoptera.

Parasitica.

Homopten.

Heteropten

Dermoptera

Orthoptera

Lepidoptera

Coieoptera ,

Siphooaptera.

Hjmenoptera

Diptera

��1

�2

�8

�4

�5

�6

�7

�8

�Of No

�Ii^ur.

� �iB^ari-

� �iDJari-

�Pare.

�Bene-

�£00-

�to

�SeaT-

�oua to

�Preda-

�ousto

�sitle

�ficial

�Domlo

�Stored

�engen

�Verte-

�tory

�Vece- Ution

�upon

�Plant

�Impor-

�Prod-

� �brates

� �Inseote

�Feeders

�tADoe

�acts

� � � � � � � �3

�88

� � � � � �29

� � � � � � � �26

� �1

�101

� � � � �36

�2

� � � � � � �9

� � � �44 11

� � � �60

� � �18 2

�121 142

�14

607 269

�■

� �6

�3

4

�26

� �9

�140 2,091

� � � �44

�1,161

�4

�696

�1,207

� � � �2

�118

� �302

�362

�1,012

�211

� � �476

�138

�367

�486

�267

� �164

�68

�1,818

�263

�1,682

�6,076

�1,269

�211

��Total

No.

Speciei

��41

29

26

101

1

38

9

44

11

60

121

14

13

607

413

6

162

2,120

3,108

4

2,007

1,707

10,630

��TABLE n

Percent.

Insects of no economie importance 1.55

Insects injurious to stored products 0.55

Insect scavengera 17.26

Insects injurious to vertebrates 2.40

Predatory insects 15.97

Insects injurious to vegetation 48.19

Insect parasites 12.05

Beneficial plajit feeders 2.00

��Table II. indicates the percentages of the different groups. Thus 17.26 per cent, of all the species found in New Jersey can be classed

�� �