SUBPHYLUM III 



INSECTA 



817 



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



Small, wingless, semiparasitic Insects with slender body, suctorial mouth parts, short, 

 clubbed antennae, and legs adapted for 

 springing ; tarsi jive-jointed. 



The sole representative of this 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 that Kecent species of 

 this genns are restricted to central Europe, 

 and still inhabit the same region as in 

 mid-Tertiary times. 



region as 



t Order 37. PROTOHEMIPTERA 

 Handlirsch. 



Fig. 1587. 



Palaeopsylla klehsiana Dampf. Lower Oligocene ; 

 lialtic amber. aB/^ (after Dampf). 



Head small with projecting suctorial 



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



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



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



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



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



\ ' legs long and probably raptorial. 



^ tut 



The sole representative of this group so far as 

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

 of which is the highly interesting E. boeckingi 

 Dohrn from the Lower Permian of Oldenburer. 

 It is a generalised form, and may he regarded as 

 a connecting link between the Palaeodictyop- 

 tera on the one hand, and the Homoptera and 

 Hemiptera on the other. 



t Order 38. 



PALAEOHEMIPTERA 



Handlirsch. 



A 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. 



Fic. 15S8. 



Euyereon boeckingi Ddlun. Perniian ; Birkenfeld in Oldenburg, 

 3/4 (after Dohrn). 



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

 VOL. I 3 G 



