MIMICRY AMONGST THE BLATTIDJE. 371 



Total length 9*5 mm. ; length of tegmina 7 -9 mm. ; pi-onotum 

 3 mm. x 5 mm. 



Philippine Is. (Stockholm Mus., type, coll. Semper). 



This species is a good mimic of Prioptera sinuata Oliv. (Oassi- 

 didse), and it is highly probable that a Coccinellid and perhaps a 

 Ohrysomelid also enter into mimetic relationship with these 

 forms. (PI. XLYIII. fig. 8.) 



Prosoplecta semperi, sp. n. (PI. XLYIII. fig. 13.) 



§ . Differs from P. nigroplagiata in the following details : — 

 Size larger and broader; the general ground colour is rufous; 

 there are only six macula? on the disc of the pronotum, the 

 anterior pair being suppressed ; on the tegmina there are no 

 lines joining any of the maculae, the maculae are as in nigro- 

 plagiata; there is an ellipsoidal piceous marking on the part of 

 the right tegmen overlapped by the left; the disc of the sub- 

 genital lamina is suffused with castaneous. 



Total length 10 - o mm. ; length of tegmina 7 - 8 mm. ; pronotum 

 3 mm. x 5 - 8 mm. 



Philippine Is. (Stockholm Mus., type, coll. Semper). 



Mimics Leis dunlopi Crotch (Coccinellidse). (PI. XLYIII. fig. 12.) 



Prosoplecta ligata Br. 



Cassidocles ligata Brunner von Wattenwyl, Nouv. Svst. Blatt. 

 p. 262, pi. vi. fig. 28 (1865). 



The species is known to me only from the description, which 

 it is unnecessary to reproduce, since it occurs in the vade-mecum 

 of all students of the Blattidse. 



Philippine Is. (Stettin Mus., type). 



Prosoplecta rufa Kirby*. (PI. XLYIII. fig. 16.) 



Prosoplecta rufa Kirby, Ann. Mag. Nat. Hist. (7) xii. p. 379 

 (1903). 



This species is known to me only from the description, which I 

 transcribe : — 



" Long. corp. cum tegm. 9 milliin. ; lat. 5 millim. 



" Female. — Light red, the tegmina somewhat darker. Pro- 

 notum smooth and shining, with the front border narrower than 

 the hind border, transversely oval, with broad borders of sub- 

 hyaline yellow covering the rounded off lateral angles, a^rri the 

 hind border yellow. Tegmina with the costal margin subpyaline 

 yellow, a small yellow spot near the base, and another at one 

 third of the length, both near the costa ; between the second and 

 the inner margin is a much larger, transverse, oval, yellow spot. 

 Base of tegmina blackish. Wings, and a great portion of the 

 middle of the abdomen beneath, as far as the base of the terminal 

 segment, black." 



Philippine Islands, Mindanao (British Mus., type). 



* It is probable that Z\ rufa is identical with P. biptmctata, a discovery made 

 long after this paper was in the press. The extreme difficulty under which the paper 

 was written must he my excuse. 



[15] 



