VJO, .] NATURAL SCIKXCES OF PHILADELPHIA. 309 



While this species is closely related to 0. nitidum, it is not possible 

 to refer the specimens here placed under the new form to the older 

 species, and at the same time take proper cognizance of differences 

 in the jrcnitalia. As far as our available material goes the two forms 

 are perfectly distinct, and for this reason it appears best to regai-d 

 them for the present at least as separate species. 



Three males and one female from Florida have been examined in 

 addition to the types. One male is paratypic with the type of that 

 sex, and the remaining individuals are paratypic with the female 

 (August 16 and 17). At Pablo Beach the species was found in grass 

 along railroad tracks, and at Gainesville it was taken in fields in the 

 undergi'owth of pine woods around a sink-hole. The species also 

 ranges into southern Georgia at Thomasville (vide supra). 



Such variation as exists in size in the specimens examined is compara- 

 tively slight, and in color the chief variation is in the intensity of the 

 paired brown bars on the pronotum. The latter feature varies from 

 a form with a pair of distinct slightly constricted, sublyrate bars to one 

 in which they are only faintly suggested. In but one case, however, 

 do they extend upon the metazona. 



Experience in the field demonstrated the bulldog-like tenacity with 

 which this species retains its grip when on the defensive, and the 

 specific name has been given for this reason. In one case its hold was 

 so strong that the head was torn from the body without the jaws 

 relaxing their grip. 

 Orchelimum fidicinium n. sp. 



Types : o ' and ? ; Cedar Keys, Levy County, Fla., August 15, 1905. 

 (Hebard and Rehn.) 



Allied to 0. delicatum and gladiator I^runer from Nebraska and 

 Indiana, but differing from the former in the longer cerci of the male, 

 the shorter subgenital plate of the same sex, and the slightly 

 shorter and slenderer ovipositor. From gladiator it differs in the much 

 slenderer ovipositor, longer limbs, shorter subgenital plate of the male 

 and the heavier and longer male cerci. 



Size small (for the genus) ; form elongate. Head Mith the fastigium 

 not appreciably elevated above the level of the occiput; fastigium 

 rather long, narrow, subequal, the apex rotundato- truncate when 

 viewed dorsad, moderately rounded when viewed laterad, fastigium 

 of the face in contact with that of the vertex; eyes rather large, 

 somewhat prominent when viewed dorsad ; antennae about three times 

 the length of the body. Pronotum with the disk but little flattened; 

 cephalic margin slightly emarginato-truncate, caudal margin moder- 

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