84 THE BLATTIDAE OF PANAMA 



mately as long as third, widening evenly and gently distad, so that it becomes twice 

 as broad as the third joint; fifth joint three-quarters as long as fourth, moderately 

 expanded, greatest width near base, ventral margin from that point nearly straight, 

 oblique to apex. Pronotum strongly transverse; cephalic margin truncate; lateral 

 margins rather strongly convex, this greatest caudad; caudal margin transverse but 

 slightly and broadly rotundato-angulate produced mesad; discal sulci very weak. 

 Tegmina and wings less ample than in angustata, length approximating body length, 

 not as in that species decidedly greater than body length. 



Dorsal surface of abdomen with second and third segments showing a weak longi- 

 tudinal ridge along the lateral margins; fourth, fifth and sixth segments with similar 

 ridges more pronounced and oblique, extending to the caudal margin a distance from 

 the latero-caudal angle. Sixth dorsal segment weakly depressed mesad and bearing 

 there an inconspicuous tuft of agglutinated hairs, less heavily chitinous in median 

 section with caudal margin there very feebly and broadly concave. Seventh dorsal 

 segment narrowly projecting, on each side forming a raised oval, transverse to the 

 body length, its cephalic and internal margin formed by a moderately decided ridge, 

 this segment showing no medio-longitudinal ridge, caudal margin broadly concave 

 between these areas. Eighth dorsal segment very narrowly projecting, its caudal 

 margin convex. 



Supra-anal plate strongly transverse, showing a broad and weak triangular pro- 

 duction between cereal bases with rounded apex obtuse-angulate. Cerci small, 

 elongate and slender, tapering to acute apex; dorsal surface flattened, ventral sur- 

 face of each joint convex with lateral margins strongly cingulate, the latero-external 

 margins the more so. Paired plate beneath supra-anal plate large and unspecialized. 



Concealed genitalia complex. i>' Subgenital plate symmetrical, surface with a 

 flexure dorsad toward the free margin; sinistral margin straight, oblique to median 

 portion, dextral margin oblique to median portion with a moderate obtuse-angulate 

 convexity; median portion with two deeply inset and smoothly rounded styliform 

 plates which taper and are attingent distad (suggesting the type found in Choriso- 

 neura), four-fifths as long as distance from their base to margin of preceding segment, 

 between these styles is a very thin plate, slightly over half as long, with ventral 

 margin armed with minute sharp recurved teeth. 



Armament of limbs, pulvilli, tarsal claws and arolia as given here in generic diag- 

 nosis. Succeeding tarsal joints only three-fourths as long as caudal metatarsus. 



Allotype. — 9; Porto Bello, Panama. February 15, 1911. . (E. 

 A. Schwarz.) [United States National Museum.] 



Agrees closely with type in coloration, color pattern and length of organs of flight. 

 Body somewhat larger. Interocular space scarcely wider. Dorsal surface of 

 abdomen unspecialized. Su])ra-anal plate transverse, very broadly bilobate, 



"3 In almost all the material of the genus at hand, the concealed male genhalia have 

 been crushed, owing to the extremely delicate structure of the abdomen. It will con- 

 sequently be a most difficult matter to consider these organs, except in specimcMis which 

 are fresh or have been kept in liquid preservative. 



