COLLECTION OF BLATTID^ ENCLOSED IN AMBEK. 61 



student of the amber fauna is therefore always conscious that he has before 

 him only the weaker and more fragile forms, which could not escape their 

 living grave. 



EoTOBius BALTicus, Germ. Sf Ber. ■ 



Blatta baltica, Germar & Berendt, Organ. Reste in Bernstein, Bd. ii. Abt. 1, p. 34, pi. 4. 

 fig. 5 (1856). 



One male, quite typical in appearance. No. I 13755. 



ISCItNOPTEKA Sp. 



A mere fragment of the entire insect, consisting of head, pronotum, and 

 front legs only. No. 1 13746. 



Temnopteryx klebsi^ Shelf. (Plate 7. figs. 3, 4.) 

 Temnopteryx Mebsi, Slielford, Journ. Linn. Soc, Zool. xxx. (1910) p. 349. 



One male, No. I 13756. 



I am able to supplement my original description of this species, as the 

 British Museum specimen is. in better condition than the type : — Sixth 

 abdominal tergite with the posterior margin sinuate. Seventh to ninth 

 abdominal segments constricted. Subgenital lamina subquadrately produced, 

 with two styles asymmetrically placed, the right situated at the bottom of a 

 deep notch, the left on the margin. Titillator penis extruded, sharply 

 pointed, apex not hooked. 



? Nyctibora succinica, Shelf. 



Nyctihora succinica, Slielford, t. c. p. 350. 



To this species I refer with very considerable doubt a larva (No. I 13748), 

 a larval moult (No. 113754), and a solitary hind-leg (No. 113757). The 

 larva is considerably smaller than the type, itself described from a larva, and 

 the moult is smaller still. The shortness of the tarsi with their well-developed 

 pulvilli and arolia show that these specimens cannot be referred to any 

 Phyllodromiine genus, nor to any Periplanetine genus known to occur in the 

 amber fauna. (Consequently there is a distinct balance of probability in 

 favour of these specimens being young larvse of Nyctihora succinica, but I 

 fear that my determination of the species can go no further than that. The 

 single hind-leg is not devoid of interest, since it reveals one of the means 

 whereby the remnants of the amber fauna have been preserved. The tarsal 

 claws are entangled in some strands of spider (?) silk ; the anterior edge of 

 the femur is ruptured and some torn muscles protrude from the rupture, 

 showing that the leg was forcibly torn from the body probably by the 

 insect's own frantic struggles to free itself. The amber surrounding the 



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