206 ENTOMOLOGICAL NEWS. [ July, ’16 
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, 1 .2 ; VU, 
6, 1915, I ¢, [both Am. Mus. Nat. Hist.]. 
Ractovkico, 1. 2) PA. NaS. Pale 
Vieques Island, Porto Rico, II, 1899, (A. Busck), 3 2, 
[WeS-N. MT. 1: 
Kingston, Jamaica, VIII, 1, 1913, (W. Harris), 2 $,6 9, 
DUES So Ne LiL. 
St. Joseph, Trinidad, XI, 9, to XII, 10, 1915, (R. A. Wood), 
3.6, 5.2, | febard. Cln.], 
Diego Martin, Trinidad, VI, 21, 1915, (R. A. Wood), 2 4, 
[Hebard Cln.]. 
Caicara, Rio Orinoco, Venezuela, 1 9, [A. N. S. P.]. 
Porto Bello, Panama, (A. H. Jennings), 1 ¢, [U.S. N. M.]. 
Panama, (H. E. Wetherell), 1 ¢,1°9, [A. No Saas 
EXPLANATION OF PLATE XV. 
Dorsal view. (Natural size.) 
Fig. 1. Blaberus giganteus (Linnaeus). Female. Cincinnati, Santa 
Marta, Colombia. 
Fig. 2. Blaberus colosseus ((liger). Female. San Esteban, Vene- 
zuela. 
Fig. 3. Blaberus colosseus (Illiger). Male. San Esteban, Venezuela. 
Fig. 4. Blaberus colosseus (Illiger). Male. Caparo, Trinidad. 
Fig. 5. Blaberus colosseus (Illiger). Male. Caparo, Trinidad. 
“Recorded by Rehn as the synonymous B. rufescens in 1903. 
