296 ENTOMOLOGICAL NEWS. [July, 'l6 



two sides will be produced in slightly different degree or form. 



Coloration. Pale portions of pronotum warm buff (recessive) to 

 clay color (intensive). Pronotal spot with caudal margin nearly two 

 millimeters distant from caudal margin of pronotum (maximum re- 

 cessive), grading through every degree to a great roughly quadrate 

 blotch in full contact with caudal margin of pronotum (maximum 

 intensive). In the maximum recessive coloration the tegmina are 

 transparent light ochraceous buff, with humeral trunk blackish brown 

 for one-third the tegminal length ; our series shows every degree of 

 intensification to one in which the anal and narrow lateral portion of 

 marginal and scapular fields are cinnamon buff, the humeral trunk 

 blackish brown with this color spreading out beyond the anal fields, 

 the remaining distal portions of the tegmina, exposed when at rest, 

 deep chestnut brown. The portion of the dextral tegmen, concealed 

 when at rest, has a faded and more buffy appearance. The wings are 

 usually weakly suffused with brown, but in specimens of maximum 

 intensive coloration this suffusion is rather decided and more pro- 

 nounced in the anterior field. Even in the maximum recessive color 

 condition the limbs remain shining very dark brown, the underparts 

 much suffused with this color. 



Specimens Examined: 28; 10 males and 18 females. 



Puerto Plata, San Domingo, IV, 7 and 8, 1915, I 9 ; VII, 

 6, 1915, I $, [both Am. Mus. Nat. Hist.]. 



Porto Rico, i 9," [A. N. S. P.]. 



Vieques Island, Porto Rico, II, 1899, (A. Busck), 3 9, 

 [U. S. N. M.]. 



Kingston, Jamaica, VIII, i, 1913, (W. Harris), 2 3,6 9, 

 [U. S. N. M.]. 



St. Joseph, Trinidad, XI, 9, to XII, 10, 1915, (R. A. Wood), 

 3 $, 5 9, [Hebard Cln.]. 



Diego Martin, Trinidad, VI, 21, 1915, (R. A. Wood), 2 $ , 

 [Hebard Cln.]. 



Caicara, Rio Orinoco, Venezuela, i 9 , [A. N. S. P.]. 



Porto Bello, Panama, (A. H. Jennings), i $, [U. S. N. M.]. 



Panama, (H. E. Wetherell), i $, i 9 , [A. N. S. P.]. 



EXPLANATION OF PLATE XV. 

 Dorsal view. (Natural size.) 

 Fig. i. Blaberus giganteus (Linnaeus). Female. Cincinnati, Santa 



Marta, Colombia. 



Fig. 2. Blaberus colcsscus (Illiger). Female. San Esteban, Vene- 

 zuela. 



Fig. 3. Blaberus colosscus (Illiger). Male. San Esteban, Venezuela. 

 Fig. 4. Blaberus colosscus (Illiger). Male. Caparo, Trinidad. 

 Fig. 5. Blaberus colossci/s (Illiger). Male. Caparo, Trinidad. 



"Recorded by Rehn as the synonymous B. rufcscens in 1903. 



