1912.] NATURAL SCIENCES OF PHILADELPHIA. 199 



These measurements plainly show that, in the United States, the 

 species reaches its greatest size at the northern limit of its range, and 

 that it gradually and constantly decreases in size southward, although 

 in all of the large series from a single locality there exists a great 

 amount of size variation. Specimens from Cabanas, Cuba, are very 

 much like those from Key "West. 



Color Notes. — Ground color of dorsal surface of pronotum, head, 

 mesonotum, metanotum, and sometimes first abdominal segments, 

 russet, in some individuals varying to mars-brown. In the majority 

 of specimens, sides and under portions of head, lateral lobes of 

 pronotum, all of the limbs and under portions of body excepting 

 abdomen are of a much lighter shade, the outer and dorsal faces of 



Fig. 7. — Cryptoptilum anlilla- 



rum. Apex of ovipositor. Fig. 8. — Cryptoptilum antillarum. Maxillary 

 (Greatly magnified.) palpus. (Greatly magnified.) 



caudal femora often dark. Abdomen black, frequently marked 

 above on edges of segments with brown, this usually more pronounced 

 in female sex, and females are occasionally found with whole dorsum 

 of abdomen suffused with that color. Maxillary palpi usually color 

 of under portions of body, sometimes darkly suffused toward distal 

 extremity of last segment. 



Specimens covered with scales usually appear wholly silvery-drab 

 or silvery-white, as all portions of the insect excepting the eyes, face 

 and feet are heavily scaled. Specimens frequently have these scales 

 rubbed off in such a way that the insect would at first glance appear 

 to belong to a distinct species. An inconspicuous dark post-ocular 

 bar is often to be found on the head in the present species ; but is 

 never continued on the pronotum. 



Distribution- — In the United States this species is found within 

 the boundaries of the Lower Austral Zone; the most northern 

 locality at which it has been taken is Beaufort, on the central portion 

 of the coast of North Carolina, and the vicinity of Wilmington on 

 the southern coast of that State. A specimen before us from Brazos 

 County, Texas, constitutes the most western record at the present 

 date. The species is found on the Bermudas, and is probably widely 



