SUHPHYLUM III 



INSECTA 



817 



Order 36. SUCTORIA De Geer (Siphonaptera, Äphaniptem auct.). (Fleas). 



Small^ wingless, semijmrasüic Insects with slender body^ suctorial mouth parts, short, 

 cluhbed antennae, and legs adapted for 

 spriuging ; tarsi ßve-jointed. \, 



Tlie sole representative of tliis order in 

 the fossil State is a species of Palaeopsylla 

 Wagn. (Fig. 1587) preserved in Baltic 

 amber of Lower Oligocene age. It is 

 interesting to note tliat Recent species of 

 this genus are restricted to central Eiirope, 

 and still inhabit the sanie region as in 

 mid-Tertiary tiraes. 



t Order 37. PROTOHBMIPTBRA 

 Handlirsch. 



Fig. 1587. 



Palaeopsylla klebsiana Dampf. Lower Oligocene ; 

 lialtic amber. 36/j (after Dampf.), 



Head small with projecting suctorial 



mouth parts differing from the heak of true Hemiptera only in that the palpi of the 



second maxilla are not fused in the middle line. Body stout, with a broad pronotum, 



Wings horizontally expanded, the venation primitive, resembling that of the Palaeo- 



dictyoptera, and ivith numerous cross-veins ; the anal area not separated off by an anal 



. furrow so as to form a distinct region or " clavus." Front 



N^. ^ A legs long and probably raptorial. 



The sole representative of this group so far as 

 known is Eugereon Dohrn (Fig. 1588), the genotype 

 of which is the highly interesting E. boeckingi 

 Dohrn from the Lower Permian of Oldenburg. 

 It is a generalised form, and may be regarded as 

 a connecting link between the Palaeodictyop- 

 tera on the one band, and the Homoptera and 

 Hemiptera on the other. 



Fio. 15S8. 



Eiujcreon boeckingi Dohrn. Permian ; Birkenfeld in Oldenburg. 

 3/4 (after Dohrn). 



t Order 38. 



PALAEOHBMIPTBRA 



Handlirsch. 



Ä provisional group, estab- 

 lished for the reception of cer- 

 tain fragmentary remains, 

 mostly wings, which combine 

 in themselves the characters of 

 the Homoptera and Hemiptera. 

 The " clavus " or anal region 

 is separated by a straight ridge, 

 the corium and membrane are 

 not distinctly separated. 



Here are placed the families Prosbolidae (typified by the genus Prosbole Handl.) 

 VOL. I 3 G 



