1912.] NATURAL SCIENCES OF PHILADELPHIA. 219 



When compared with Mogoplistes the following differences are 

 found. Head very different, ovoid, interantennal protuberance not 

 as produced and with no vertical sulcus, eyes not so protuberant; 

 pronotum with dorsal surface more flattened; caudal femora shorter, 

 caudal tarsi very much shorter, proportionally very much longer 

 caudal metatarsi; armament of limbs different, as in Cycloptilum, 

 but all of the spurs and serrulations much smaller. The ovipositor 

 in Mogoplistes is straight, rather long, with lateral division of valves 

 exactly at middle proximad, but rising sharply and much nearer the 

 dorsal margin over the greater length of the ovipositor, the apex is 

 not widened and is armed on the ventral edge of the dorsal valves 

 with blunt, knob-like serrations, while the surface of the dorsal valves 

 is finely punctate. In Oligacanthopus the ovipositor is very different 

 from this as may be seen by reference to the description. 



Generic Description. — Head small, transverse, subelongate, smooth, 

 interantennal protuberance weak, broadly rounded, flattened distad, 

 no vertical dividing sulcus present; eyes pyriform, very slightly 

 inflated; maxillary palpi not very long, gently expanding distad, 

 the distal joint mildly obliquely truncate. Pronotum of female 

 subquadrate in form, cephalic margin subtruncate, weakly arcuato- 

 emarginate, caudal margin weakly arcuate, leaving the entire metano- 

 tum exposed. Tegmina absent in female. Ovipositor very gently 

 arcuato-convex, very short, somewhat elongate sublanceolate at 

 apex, lateral division of valves exactly at middle of sides, the 

 surface of apex smooth, the ventral margins of the ventral valves 

 armed distad with a row of minute serrulations. Subgenital plate 

 of female rotundato-trigonal. Cerci elongate, subcrassate, tapering. 

 Caudal femora dilated; caudal tibiae proportionately heavy and short, 

 minutely serrulate on dorsal margins, with three pair of distal spurs, 

 the dorso-internal shorter than the ventro-internal; caudal meta- 

 tarsus elongate, proportionately slender, equal to over one-half the 

 caudal tibia in length, dorsal margins supplied with minute serrula- 

 tions, second joint not quite as long as third joint. 



Distribution in North America. — Extreme southern Florida. 



Oligacanthopus prograptus 1 " n. sp. 



1905. Mogoplistes slossoni Rehn and Hebard (not Mogosiplistus slossoui 

 Scudder, 1897), Proe. Acad. Nat. Sci. Phila., 190o, p. 48. [Miami, 

 Florida.] 



Type: 9 ; Miami, Dade County, Florida, under sign on oak in 

 "hammock," February 6, 1904. (Hebard.) [Hebard Collection.] 



46 From ~/">, in front, and ypairroc, that which is written upon; in allusion to 

 the striking dark bars on the facial protuberance. 



