MORGAN HEBARD 95 



and one distal)"" heavy and moderately elongate spines. Cei)halic tibiae slightly 

 over three times as long as greatest width. Median and caudal femora with ce- 

 phalic margin armed with (three and one distal) heavy and elongate si^ines; caudal 

 margin armed with (two and four and one distal for median femora, four and no 

 distal for caudal femora) more elongate spines. Caudal metatarsus distinctK* longer 

 than combined length of succeeding joints, its ventral surface with two rows of short 

 stout spines which diverge distad about the small globose puK'illus; second joint 

 similar, but with rows of spines very short; third joint similar, but with proximal 

 half unarmed; fourth joint with ])ulvillus occupying its entire ventral surface, with a 

 few spines laterad. Arolium present only as a small node between base of claws. 



General coloration of dorsal surface blackish brown, the lateral portions of the 

 pronotum, costal field of the tegmina, very narrow lateral margins and narrow 

 caudal margins of the dorsal abdominal segments, except the minute ridges which 

 are blackish, of a somewhat metallic prout's brown. I'nder high magnification the 

 chitinous structure is seen to be translucent, tinged with ochraceous-tawny and over- 

 laid with blackish brown, this absolutely solid only on the pronotum and proximal 

 portions of the tegmina, breaking into spots and dots in the paler areas and there 

 resultantly having somewhat the appearance of tortoise shell. Cerci buffy tinged 

 with tawny. Head shining blackish brown, except the vertex which has a narrow 

 irregular suffused band of light ochraceous-tawny between the eyes, with three 

 irregular longitudinal lines of this color running caudad. Ocellar dots ochraceous- 

 tawny. Antennae beyond first joint and mouthparts slightly paler than face 

 and showing a tawny tinge. Ventral surface of abdomen shining black. Limbs with 

 spines all russet. Coxae blackish mars brown, shading to slightly paler distad; 

 femora deep russet; tibiae russet; tarsal joints buffy with ventral rows of spines russet. 



Length of body, 30.3; width of head, 5.6; length of antenna, 13; length of prono- 

 tum, 8; width of pronotum, 12.8; exposed length of tegmen along humeral trunk, 

 7.1: exposed length of tegmen along sutural margin, 4.8; width of tegmen, 8.9; 

 width across tegmina, 15.6; width across first abdominal segment, 15.8; greatest 

 width of abdomen (across third abdominal segment), 16.6; length of cercus, 1.8; 

 length of cephalic tibia, 3; length of caudal femur, 7.2; length of caudal tibia, 9.2; 

 length of caudal metatarsus, 3.2 millimeters. 



A series of immature individuals, representing three of the earlier instars, are of 

 interest in showing the brief longitudinal ridges at the caudal margins of the dorsal 

 abdominal segments and also on the i)ronotum, mesonotum and metanotum, 

 relatively more decided than in the adults. These specimens are not as polished 

 and not as solidly dark, appearing dark prout's brown shading to prout's brown, 

 while the smallest show a vague but broad medio-longitudinal dorsal abdominal 

 band preceded on the metanotum l)y an inxerted "V" of slightly paler coloration. 



The antennae are, however, of particular interest. In the adult they are 

 unicolorous with fifty-seven joints. In the instar fourteen millimeters in length 

 they have thirt\' to thirt\--se\('n joints, of which the fourteenth to sixteenth are 



"" On one side the distal spine is atrophied, a minute socket alone showing. A certain 

 amount of general atrophy is shown by the structure and irregularity of the spines. 



MEM. AM. ENT. SOC, 4. 



