1912.] NATURAL SCIENCES OF PHILADELPHIA. 217 



lobes of the pronotum to the caudal margin. Rubbed specimens 

 show that the ground color of the species on head, pronotum, meso- 

 notum, metanotum and all of the limbs is very pale yellowish, while 

 the abdomen is black and the ovipositor dark brown. Unlike in 

 squamosum, the post-ocular bar mentioned above is present not only 

 in scale coloration but ground coloration as well, while the lateral 

 lobes of the pronotum are somewhat lighter in coloration than its 

 dorsal surface. The maxillary palpi are usually light, the apical 

 joint suffused with blackish distad, this darker suffusion in a few 

 cases overspreading the last three joints. The tegmina are bone 

 white, the caudal border lightly blotched with black. 



Distribution. — Lake Worth, southward to Key West, Florida. 



Biological Notes. — Nearly all of the specimens of this terrestrial 

 species have been captured hiding on the under surface of coquina 

 boulders near or on the strand ; the type, however, was captured in the 

 low undergrowth growing on rough coquina rock in the scattering 

 pine woods back of Miami. The little insects have never been found 

 more than two or three at a time, and usually a considerable area 

 has to be carefully searched before any specimens are discovered. 

 When first exposed they usually remain motionless and closely 

 pressed to the surface of the rock under which they had been hiding; 

 when disturbed, however, they spring about wildly and are so hard 

 to follow with the eye that unless captured before they are thor- 

 oughly aroused, individuals have excellent chances of escaping. 



Remarks. — This species is unquestionably closely related to 

 Cycloptilum squamosum, and it is possible that it may prove to be a 

 geographic race of that species limited to southern Florida. Without 

 material from the region between Palm Beach and Jacksonville, 

 however, we are unable to find the slightest suggestion of inter- 

 gradation. The facts that the characters which separate zebra 

 from squamosum are constant, and that the former species is invaria- 

 bly much the smaller, rather suggest that zebra is not a race at all, 

 since over the tremendous range of squamosum, no such differences 

 are to be found in that species. 



In the entire series of females the subgenital plate is, without 

 exception, arcuato-convergent laterad with the distal section of the 

 margin flattened, but with no trace of the emargination and acute 

 spiniform angles found in so many females of squamosum from the* 

 Atlantic coast. 



Specimens Examined. — 21; 6 males, 9 females and 6 nymphs. 

 15 



