MORGAN HEBARD 369 



Desecheo Island, Porto Rico, II, 18 and 19, 1914, (F. E. Lutz; dead leaves 

 in sea-grape thicket and under low trees on hillside at 100 feet elevation), 1 d^, 

 2 9, type, alloiype and parutype, 4 juv. cT, 3 small juv. cf, 1 small jiiv. 9, 

 [A. M. N. H.]. 



Mona Island, Porto Rico, II, 22 and 24, 1914, (F. E. Lutz), 2 9, paratypes, 

 [A. M. N. H.]. 



Aguas Claras, Porto Rico, I, 19, 1914, 2 9 , [U. S. N. M.\. 



St. John, Danish West Indies, 1 9, [M. C. Z.]. 



Symploce bicolor (Beauvois) (Plate XVIII, figs. 18, 19, 20 and 21.) 



1S0.5. Blatta bicolor Beauvois, Ins. Rec. Afr. Amer., p. 183, pi. II)., fig. (i. 

 [San Domingo.] 



Beauvois' figure is very rough and the Hne intended to show 

 the natural size of the specimen was omitted; his description is 

 also decidedly unsatisfactory. With a considerable series of 

 roaches before us from San Domingo, however, we find that the 

 material, here assigned to the siJecies, alone agrees in every 

 way. 



The present insect and S. lita are much the most distinctive 

 of the genus; this is particularly shown here by the remarkable 

 and very unusual specialization of the male supra-anal plate. 



Characters of cf. — (San Francisco Mountains, San Domingo.) Size rather 

 small and form moderately slender for this genus of moderately robust species. 

 Head with eyes not as large as in lita. Interocular space slightly narrower 

 than that between the ocelh, agreeing in this respect and in the ocelli with iS'. 

 capitata.^^ Pronotum very slightly more transverse than in that si)ecies. Me- 

 dian segment specialized as in capitala, and with succeeding dorsal abdominal 

 segments to sixth as in that species; sixth segment as in S. flagellata but with- 

 out any median elevation; seventh segment concealed; eighth segment with 

 entire distal margin fringed with hairs, otherwise as m flagdlata . Supra-anal 

 plate with distal portion produced mesad in a very slender, elongate, tapering 

 structure, which is considerably longer than the remaining proximal portion 

 of the plate and reaches to the distal margin of the subgenital plate, this struc- 

 ture is blunt at the apex, its lateral margins are briefly upcurled, between which 

 it is subchitinous; the remaining lateral portions of the free margin proximad 

 are weakly convex and almost transverse; surface of proximal portion of plate 

 with a medio-longitudinal ridge and a similar transverse ridge proximad, be- 

 tween these it is weakly concave. Subgenital i)late with surface more strongly 

 convex than in the other species of the Capitata Group, free margin convex 

 except just sinistrad of mesal point, where a brief but distinct concavity occurs, 

 above this from the inner edge of the margin springs a recurved rounded scute, 

 with a minute knob (dextral style) at its dextral base, and an elongate chitinous 



*^ Usually with a distinctive interocular marking. 



TKAX.S. AM. E\T. SOC, XLII. 

 3 



