32 NORTH AMERICAN BLATTIDAE 



Aglaopteryx gemma new species (Plate I, figures 9 to 12.) 



The present species has been incorrectly recorded as "Ceratin- 

 optera' diaphana'° to which it is closely allied; it is found to differ 

 from that insect, however, in the anchor shaped, not transverse, 

 bar of the dark marking in the pronotal disk; the more reduced 

 and sharply truncate tegmina; absence of wings; dorsal surface 

 of abdomen beautifully maculate with blackish brown, pale red- 



" Aglaopterym diaphana (Fabricius) 



1792. B[latta] diaphana Fabricius, Ent. Syst., ii. p. II. [Islands of South America 

 (West Indies).] 



Ceratinoptera diaphana of Brunner and subsequent authors. 



This species has been recorded by various authors from the West Indies; all records 

 from the United States by Rehn and Hebard and by Davis (excepting that from Big 

 Pine Key, Florida, which was based on an immature example of Latiblattella rehni) 

 apply to A. gemma. 



In this species the bar of the dark marking in the pronotal disk is normally transverse; 

 the tegmina are reduced, extending slightly beyond, to falling distinctly short of, the 

 apex of the abdomen, but never truncate distad; the wings are present but reduced; 

 the dorsal surface of the abdomen is normally very dark, narrowly margined with buffy; 

 the male subgenital plate is distinctive. This plate is small, convex, irregularly pro- 

 duced, with two large, irregular concavities mesad on the distal margin, occupied by 

 broad styles; the sinistral a brief lobe, broader than long; the dextral large and flattened, 

 with mesal extremity produced in an elongate finger, about three times as long as broad, 

 with tapering but blunt apex directed sinistrad; mesad between the styles the plate is 

 briefly and narrowly produced, this almost equal in length to the sinistral style, while be- 

 tween this and the dextral style is situated an elongate, slender, chitinous, almost 

 straight, sharply pointed projection, extending as far distad as sinistral style. The 

 cephalic femora have the ventro-cephalic margin with distal spines even more elongate 

 than in gemma, two or three in number; the ventro-caudal margin is often supplied with 

 other spines beside the distal one. 



These observations are based on the following material now before us. 



Paget West, Bermuda, I, 2 to V, 17, 1909, (F. M. Jones), 30^, 3?. i juv. <f^, 2 juv. 

 ?, 2 very small juv. 9, [A. N. S. P. and Hebard Cln.]. 



Hamilton, Bermuda, II, 24, 1910, (E. G. Vanatta), i very small juv. cf , [A. N. S. P.]. 



Mona Island, Porto Rico, II, 21 to 26, 1914, (in a dead branch, ten feet above ground), 

 I juv. ?, [Am. IVIus. Nat. Hist.]. 



Montcgo Bay, Jamaica, X, 29, 1913, (Hebard; in bromeliad on forest tree with 

 Nyctihora laevigata and numerous Carihlatta insidaris), i 9 , [Hebard Cln.]. 



Long Ditton, Dominica, VI, 19, 1911, (Crampton and Lutz), i9, [Am. Mus. Nat. 

 Hist.]. 



Easy Hall, Barbados, IX, 24, 1902, (H. M. Lefroy), i 9 , [A. N. S. P.]. 



Of this material, the specimen from Jamaica is small and has no markings within the 

 pronotal disk, (hat from Dominica is unusually large, while tiiat from Barbados has the 

 proportionately longest tegmina of the scries. 



