464 CLASS VIII. 
Psalidophora Srrv., Forficesila Latr., Serv., Pygidicrana Surv. Comp. 
SERVILLE, Hist. nat. des Orth. pp. 18—55. 
LATREILLE conjoined apterous species under the name of Chelidura, spec. 
of genus Forficula SERVILLE. 
Appendix to the Order Orthoptera. 
Thrips Lu. Body linear, depressed. Head produced inferiorly 
like a rostrum; labrum elongato-conical ; mandibles setiform ; max- 
ille triangular, acuminate, with short palp, of two joints or three, 
without galea; labial palps very short, with two or three joints. 
Antenne of the length of head and prothorax, filiform, mostly with 
eight joints (five to nine). Wings mostly four, membranous, narrow, 
incumbent, with margin ciliated. Feet short, with tarsi biarticulate, 
the second joint without claw, terminated by a vesicular plantula. 
Note.—Small insects living in plants, especially in flowers, which 
were first detected and described by DE Grrr in the middle of the 
last century, under the name of Physapus. He then discovered 
palps ; and since the Hemiptera are destitute of these, they have been 
referred improperly to that order by several writers. Some think 
that they compose an order of their own (Thysanoptera Hauipay, 
Westwoop). They differ from Orthoptera by the absence of the 
galea. ‘The family is of uncertain position, intermediate amongst 
the Neuroptera, Orthoptera and Hemiptera. Metamorphosis incom- 
plete. 
In some the females are provided with a quadrivalve sting or borer, 
(Terebrantia Hau.), in others there is not such a borer, but the abdomen 
terminates in a tubule (Zubulifera). Some species in both sections are 
apterous. 
Comp. DE Grrr, Mém. 111. pp. r—18. Pl. 1; Burmeister, Handb. der 
Entom. 1. 2, pp. 404—418; WeEstwoop, Modern Classification, 1. pp. 1— 
5, Generic Synopsis, pp. 45, 46; Léon Durour, Description et figure d’une 
nouvelle espéce de Thrips (Thrips aptera Léon Dur., and Phleothrips 
pedicularis Hauipay !), Ann. des Sc. nat., sec. Série, Tom. x1. 1839, pp. 
321—324, Pl. 8, figs. 8—18; E. HenceEr, Beitrdge zur Naturgeschichte der 
Physapoden. Mit Kupfert. Aus dem Jahrgange 1852 der Sitzungsberichte 
der Kaiserl. Akad. der Wissensch. zu Wien. Besonders abgedruckt. 8vo. 
Sub-genera Phlwothrips, Heliothrips, Sericothrips, Thrips, Melanthrips, 
Holothrips HALIDAY, Entom. Magazine, Tom. 11. and Iv. 
OrvER XII. Coleoptera. 
Hexapod insects, with four wings, the anterior hard, coriaceous, 
covering the posterior membranous, folded back transversely before 
