1912.] NATURAL SCIENCES OF PHILADELPHIA. 221 



Measurements (in millimeters). — 9 : Length of body, 5.8; length 

 of pronotum, 1.5; caudal width of pronotum, 1.4; length of caudal 

 femur, 3.7; greatest width of caudal femur, 1.2; length of caudal 

 •tarsus, 2; length of caudal metatarsus, 1.2; length of ovipositor, 2.5. 



Color Notes. — So heavily covered with scales is the only specimen 

 known that it is difficult to state the ground coloration of the insect. 

 This coloration appears to be very pale wood-brown over the entire 

 surface of the body; the interantennal protuberance never has the 

 distal portion scaled, and in the present species this is strikingly 

 marked with four parallel vertical bars of bistre separated by bars 

 of the ground color of the same width, these somewhat more tinged 

 with yellowish. The terminal joints of the maxillary palpi have 

 also a broad band of bistre encircling their median portion, while the 

 tip is more yellowish than the basal portion of the palpi which is of 

 the prevailing very pale wood-brown. The antennae are colored as 

 the tips of the maxillary palpi, but have the third, sixth, tenth and 

 sixteenth joints on each side bistre. The scaly covering is composed 

 of silvery scales among which darker ones are found in confused 

 masses, the tarsi all are distinctly twice banded with these scales, 

 and in addition the base of the caudal tarsis is so darkened. The 

 general effect is that of an irregularly mottled silvery hair-brown 

 insect with banded limbs. 



Biological Notes. — Although but a single specimen of this species 

 has been captured, others were seen. All of these were observed 

 at Miami, Florida, in the heavy semi-tropical "hammock" on the 

 south bank of the Miami River, and were found by prying up loose 

 pieces of bark and tearing off signs on the low oak trees. When 

 exposed the insects sprang wildly about, to which habit is due the 

 fact that but a single specimen was taken. 



Distribution. — Miami, Dade County, Florida. 



Synonymy. — When the specimen, on which this species is based, 

 was first recorded, the authors confused it with Scudder's Mogosi- 

 plistus slossoni [Cryptoptilum antillarum] partially owing to the fact 

 that Saussure had stated that the interantennal protuberance of 

 Mogoplistes (Mogisoplistus Saussure, 1877; not Mogosiplistus Scudder, 

 1897) was not divided by a median vertical sulcus. Specimens from 

 Saussure before us of the type of that genus, Mogoplistes brunneus, 

 prove that though the interantennal protuberance is not absolutely 

 divided by a sulcus, still it shows a distinct though minute sulcation 

 quite as strongly as Cryptoptilum antillarum. This sulcation appears 

 to be found in nearly all the species of the present group, and although 



