438 PROCEEDINOS OF THE NATIONAL 3IU8EVM. vol. 51. 



inal segments distinct; median ridge not plainly evident except- 

 ing at vasiform orifice, which is situated on a prominent tuber- 

 cle. Color varying from a dark to a very pale brownish, with 

 the median area in some specimens more deepl}^ shaded than the 

 remainder of the case. Submarginal area armed with a row of 

 prominent, curved spines situated on tubercles. These are usually 

 32 m number, but there are sometimes fewer. The margin itself 

 (fig. 4) is rolled mider the case somewhat after the manner of the 

 species in the subgenus Lecanoideus. It is very minutely and 

 irregularly serrate, but there are nothing like the prominent teeth 

 which are present in some other forms. Vasiform orifice (fig. 3) 

 strongly elevated upon a tuberclehke structure, subcircular to 

 elliptic in outline, with the longest axis lyuig transversely. Opercu- 

 lum somewhat semicircular in outline, the caudal margin straight or 

 irregularly curved; lingula very broad, with only the distal extremity 

 showing below the operculum; both operculum and Hngula setose. 

 On each side of the orifice there is a large spine similar to those upon 

 the margin, and there is a pair of spines on the cephalic portion of the 

 thorax on the lower surface. Antennae and legs evident. 



Adult female. — Length from vertex to tip of ovipositor 1.84 mm.; 

 color brown, deeper on the thorax, appendages and ovipositor, 

 lighter on the abdomen. Eggs in the abdomen appearing yellowish 

 brown and numerous small bright red areas visible. Vertex as 

 viewed from above rounded, rather broad, covered with a number 

 of small, clear papillae or porelike structures, from below (fig. 7) 

 depressed, with lateral elevations and the median area covered 

 with numerous bristles. OceUi rather large, clear, and situated 

 close to the compound eyes. These latter have large facets, are con- 

 stricted m the middle, and are deep brown in color. Antennae 

 (fig. 8) short, thick, strongly imbricated, and covered with numer- 

 ous fine hahs. Segment 1 0.036 mm. in length, subcyfindric; II 0.055 

 mm., almost globose, and covered with many bristles and many 

 fine hairs; III 0.1 mm., subcylindric, strongly imbricated and 

 covered with transverse rows of fine hairs; IV 0.03 mm., similar; 

 V 0.055 mm., imbricated, hairy, and with a few small distal senso- 

 ria; VI 0.033 mm.; VII 0.033 mm., with a few sensoria near distal 

 extremity. Thorax dark brown, covered all over with very many 

 minute fine dots, which may be punctures, and with several small, 

 clear, pore-hke areas similar to those on the head. Legs brown; 

 fore tibiae 0.32 mm. in length; fore tarsi, proximal segment 0.095 

 mm., distal segment 0.096 mm.; hind tibia 0.448 mm., armed on 

 its distal extremity with a rmg of rather stout spines and along 

 its mner margin with a double row of similar ones; hind tarsus, 

 proximal segment, 0.112 mm., distal segment 0.065 mm. Foot 

 (fig. 13) about 0.032 mm. long; claws curved; paronychium nar- 

 row and generally curved. Forewmg (fig. 5) 1.36 mm. long and 



