68 ENTOMOLOGICAL NEWS. [April. 



B. Mouth-parts formed for both biting and sucking, viz., with the mandi- 



bles in the form of jaws; and with the maxillae and labium 

 fitted for taking liquid food. Both pairs of wings membra- 

 nous, with few veins and cells. Order lo. Hymenoptera. 



C. Mouth- parts formed for sucking. 



a. With four wings clothed with minute, imbricated scales; mandi- 



bles rudimentary; maxillae developed into a sucking tube. 



Order 7. Lepidoptera. 



b. With only two wings; hind wings represented by a pair of 



knobbed, thread-like organs (halteres); mandibles and max- 

 illae bristle like. Order 8. Diptera. 

 In this classification, Orders i, 3, 7, 8, 9 and 10 correspond to the simi- 

 larly named suborders of the " Guide;" 2 (White Ants, Stone-, May- and 

 Dragonflies) and 6 (Ant Lions) correspond to the Neuroptera, and 4 

 ( Thrips*) and 5 to the Hemiptera of the " Guide." 



The classification used by Dr. Packard in his " Entomology 

 for Beginners," second edition, 1889, and which he saysf will 

 probably be introduced into the next edition of his "Guide," 

 follows. After the statement of the characters of each order, is 

 placed the common and the generic names of some of the rep- 

 resentative insects thereof. 



Series I. Ametabola. — Metamorphosis incomplete. 



Order i. Thysannra. — Wingless, minute, with a spring, or abdomen 

 ending in a pair of caudal stylets; usually no compound eyes; no meta- 

 morphoses. Fish moth, Lepisina; Spring tail, Podura. 



2. Dermaptera (skin wings). — Body flat; abdomen ending in a forceps; 

 fore wings small, elytra-like; hind wings ample, folded under first pair. 

 Earwig, Forficiila. 



3. Orthoptera. — Wings net-veined; fore wings narrow, straight, not often 

 used in flight; hind wings large and folded when at rest under the first 

 pair. Cockroach, Blatta; True Locust, Acridiutn; Cricket, Gryllus, 



4. Platyptera (broad wings). — Body usually flattened. Pronotum usually 

 large and square; often wingless. Bird lice, fam. Mallophaga; .Stone-fly, 

 Perla; Book louse, Psocus; White Ant, Tertnes. 



5. Odonata (toothed, referring to the mandibles and maxillae). — Protho- 

 rax small; remainder of thorax spherical; both pairs of wings of nearly 

 the same size, net-veined. Larvae and pupae aquatic; labium of larva 

 forming a mask. Dragonfly, Libellula. 



* " It should be borne in mind that the insect commonly called The Tkrifs, that infests 

 the leaves of grape, is not a member of this order [Physopoda,] but one of the Leaf-hop- 

 pers [Eryikroneura] (family Jassidae, of the order Hemiptera). The misapplication of the 

 name Thrips to this insect is often the cause of confusion." — Comstock, Intro, p. 124. 



t Guide, ninth edition, 1889. Preface. 



