BLATTID^ PRESEKVED IN AMBER, FROM PRUSSIA. 347 



Phyllobromia pristina, sp. n. (PL 47. fig. 19.) 



No. 5^31. 



Piceons. Vertex of head not covered by pronotiim. Pronotum trape- 

 zoidal, posteriorly truncate, exposing the scutellura, laterally broadly hyaline ; 

 at the postero-lateral angles the hyaline area is very broad and extends 

 inwards irregularly towards the middle o£ the disc. Tegmina lanceolate, 

 exceeding the apex of the abdomen, about 12 costals ; discoidal sectors 

 numerous, oblique ; anal field rather elongate. Cerci moderately stout,, 

 exceeding the apex of the tegmina, with 12 visible joints. 



Total length 11 mm. 



The unique specimen is in a bad state of preservation and the sex cannot 

 be determined, for the ventral scutes of the abdomen and the abdominal 

 contents, as well as the legs, have disappeared. These injuries must have 

 been caused prior to the inclusion of the insect in the amber, probably by 

 some predatory insect, which, having devoured the more succulent portions of 

 its prey, left the carcase to be overwhelmed later in a flow of resin. The 

 pronotal pattern is the only character which I can employ to distinguish this 

 species from its congeners. It is allied to P. antiqua, but is much smaller 

 and darker. 



As the species of Pliyllodromia above described are only to be made out 

 with some difficulty, I append the following key, which may render their 

 determination easier. P. pristina, described from a single imperfect specimen,, 

 is omitted : — 



1. Front femora armed on the anterior margin beneath with a 

 few spines, succeeded distally by piliform spines. 



2. Dark castaneous ; disc of pronotum unicolorous P. lorenz-meyeri. 



2'. Testaceous ; disc of pronotum with a fuscous pattern. ... P. germari. 

 1'. Front femora armed on the anterior margin beneath with 

 a complete row of strong spines. 

 2. Pronotum with the lateral margins distinctly hyaline. 



3. Pronotum anteriorly and posteriorly with pale margins. P. yolanda. 

 3'. Pronotum without pale anterior and posterior margins. 

 4. Hyaline lateral margins extending inwards at the 



postero-lateral angles P. antiqua. 



4'. Hyaline lateral margins not extending inwards at 

 the postero-lateral angles. 



•5. Broad, depressed species P. kitissima. 



5'. Narrower species. 



6. Cerci slender, 12-jointed P. tenacula. 



6'. Cerci short and obtuse, 9-jointed P. klebsi. 



2'. Pronotum with the lateral margins not hyaline. 



3. Right genital style bifurcate at apex P. fwcifera. 



3'. Right genital style not bifurcate at apex P. baltica. 



One species of the group, ISTo. 5563, I leave undescribed, for it is repre- 

 sented by a single specimen which is so damaged that the important details 

 of its structure are not visible. 



