464 CLASS viir. 



Psalidophora SERV., Forficesila LATR., SERV., Pygidicrana SERV. Comp. 

 SERVILLE, Hist. nat. des Ortk. pp. 18 55. 



LATREILLE conjoined apterous species under the name of Clielidura, spec. 

 of genus Forficula SERVILLE. 



Appendix to the Order Orthoptera. 



Thrips L. Body linear, depressed. Head produced inferiorly 

 like a rostrum ; labrum elongato-conical ; mandibles setiform ; max- 

 illae triangular, acuminate, with short palp, of two joints or three, 

 without galea; labial palps very short, with two or three joints. 

 Antennae 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 GEER 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 HALIDAY, 

 WESTWOOD). 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 HAL.), in others there is not such a borer, but the abdomen 

 terminates in a tubule (Tubulifera). Some species in both sections are 

 apterous. 



Comp. DE GEER, Mem. in. pp. i 18. PI. i ; BURMEISTER, Handb. der 

 Entom. II. 2, pp. 404 418; WESTWOOD, Modern Classification, u. pp. i 

 5, Generic Synopsis, pp. 45, 46 ; LEON DUFOUR, Desertion et figure d'une 

 nouvelle espdce de Thrips (Thrips aptera LEON DUF., and Phlceothrips 

 pedicularis HALIDAY ?), Ann. des Sc. nat., sec. SeVie, Tom. xi. 1839, pp. 

 321 324, PI. 8, figs. 8 18; E. HEEGER, Beitrage zur Naturgeschichte der 

 Physapoden. Mit Kupfert. Aus dem Jahrgange 1852 der Sitzungsberichte 

 der Kaiserl. Akad. der Wissensch. zu Wien. Besonders abgedruckt. 8vo. 



Sub-genera Phlceothrips, ffeliothrips, Sericothrips, Thrips, Melanthrips, 

 jfiolothrips HALIDAY, Entom. Magazine, Tom. in. and iv. 



ORDER XII. Coleoptera. 



Hexapod insects, with four wings, the anterior hard, coriaceous, 

 covering the posterior membranous, folded back transversely before 



