MIMICRY AMONGST THE BLATTID-E. 373 



Prosoplecta MIMAS, sp. n. (PL XLVIII. fig. 15.) 



(S . Head I'ufous, vertex paler ; antennae testaceous, infuscated 

 towards apex. Pronotum smooth, uitid, piceous, lateral margins 

 1:)i-oa,dly hyaline, a lai'ge ochreous macula at the posterior angles, 

 enclosing three minute piceous spots, a minute V-shaped ochre- 

 ous mark in the middle near the posterior margin. Tegmina 

 minutely seriate- punctate, piceous, with the following ochreous 

 maculte on each tegmen : — one in the mediastinal area,, one in 

 the anal area extending on to the humeral angle, one in the 

 middle of the discoidal field, one outside this and touching the 

 radial vein, one at the apex, that on the left tegmen being 

 larger than tliat on the light. Wings infuscated. Abdomen 

 beneath, cerci and legs rufous, subgenital lamina as in the other 

 species of the genus. 



2 . Similar to the male but the head and abdomen darker, the 

 macula in the anal field of the tegmina almost divided into two, 

 two macidag at the apex of the left tegmen. Supra-anal and sub- 

 genital laminfB as in the preceding species. 



Total length (c5') 8-9 mm., ($) lU-9 mm.; length of tegmina 

 (6) 7 mm., ($) 9 mm.; pronotum ( J ) 2-9 mm. x 4-6 mm., 

 (5)3 mm. X 5 mm. 



PuiLipPiNE Is. (Stockholm Mus., tj/pes, coll. tSeviper). 



Prosoplecta ccelophoroides, sp. n. (PI. XLVIII. fig. 19.) 



c? . Head c.Mstaneous, vertex ochreous ; antenna; testaceous, 

 fuscous towaids the apex. Pronotum impunctate, nitid, piceous 

 with the lateral mai-gins broadly oclii'eous. Tegmina seriate- 

 punctate, piceous, with the following rufous maculae on each 

 tegmen: — a small circular one in the mediastinal ai'ea, a trans- 

 verse one extending along the base of the tegmen over the 

 humei'al angle to the base of the radial vein, another broadly 

 transverse extending across the middle of the discoidal field from 

 near the sutural mai'gin to the radial vein, a fourth circular in 

 shape, near the apex of the tegmen. Wings infuscated. Abdo- 

 men and legs rufous ; supra-anai lamina of usual shape. 



Total length 9-2 mm.; length of tegmina 8 mm.; pronotum 

 3 mm. X 4*9 mm. 



North Celebes, Toli-Toli (Oxford Mus., ti/pe, Fruhstorfer, 

 (' coll. Van de Foil). 



This is an admirably close mimic of the Coccinellid Ccelophora 

 formosa Cr. (PI. XLVIII. fig. 21), a specimen of which was taken 

 by Fruhstorfer in the same locality and at the same time of year. 

 The colouring and arrangement of the macular on the pronotum 

 and wing-covers of the tM'o insects correspond very closely, but in 

 the beetles theie is a transverse basal band on the elytra, whereas 

 in the cockroach the coi-responding patch of colour is made up of 

 a band-like spot and an outer circular spot. The mimic is 

 smaller than its model, and that appears to be rather the rule 

 than the exception amongst this group of mimetic couples. 

 Anisolemida cUstcmra Muls. (PI. XLVIII. fig. 20) is another 

 Coccinellid of neaiiy the same size and evidently also associated. 



