100 COLOMBIAN DERMAPTERA AND ORTHOPTERA 



and styles will probably show striking differences from any other 

 closely related species. 



The female closely resembles that sex of N. pellucida (Bur- 

 meister) in dorsal appearance, size of pronotum, length and shape 

 of tegmina and dorsal coloration, but differs widely in the much 

 more elongate maxillary palpi with very short distal joint, more 

 slender limbs and the inconspicuously marked ventral surface of 

 the abdomen. 



With other species carrikeri would appear to form a unit which 

 we would term the Carrikeri Group, the species distinguished by 

 their attenuate form and elongate tegmina and limbs; the elongate 

 tegmina conspicuous only in the males of some of the species. In 

 this Group, from the descriptions, we would place azteca and 

 probably alaris, both of Saussure and Pictet, and titania of 

 Rehn, from study of the type; the order being titania, alaris, 

 azteca and carrikeri, the first two species having the organs of 

 flight considerably shorter than in the others. 



Type. — cf ; San Lorenzo, Sierra Nevada de Santa Marta, Mag- 

 dalena, Colombia. Elevation, 7000 to 8300 feet. August 23, 

 1913. M. A. Carriker Jr. [Hebard Collection, Type No. 443.] 



Size medium, large for the Carrikeri Group; form slender. Interocular 

 space wide; ocellar spots barely indicated. Lateral margins of genae straight, 

 parallel. Maxillary palpi very elongate; third joint very elongate and slender, 

 distinctly longer than width between antennal sockets, fourth almost as long, 

 fifth (distal) joint slightly more than half as long as fourth, moderately enlarged, 

 oblique truncate to near its base. Pronotum with surface almost perfectly de- 

 planate, showing very feeble convexity meso-cephalad and along the caudal 

 margin, and with undulations on the shghtly impressed disk ; cephalic and caudal 

 margins truncate, feebly convex, the caudal margin much the broader; lateral 

 margins convex; greatest width at mesal point. Tegmina very dehcate and 

 elongate; with (7 sinistral, 8 dextral) longitudinal discoidal sectors; cross- 

 veinlets scarcely apparent ; minute colorless nodes widely scattered distad over 

 the surface on the veins, these the bases of minute microscopic hairs. Wings 

 very dehcate; proximal (7 and 8) costal veins heavily clubbed distad with suc- 

 ceeding (2) veins weakly clubbed; ulnar vein with (7) branches complete; 

 intercalated triangle very small. Supra-anal plate triangularly produced 

 with apex rounded, about twice as broad as long. Concealed genitalia: a very 

 slender and elongate, dark, slightly outwardly curved aciculate process is 

 apparent with apex resting in cleft above the sinistral style. Sul)genital plate 

 roughly quadrate, scoop-shaped; lateral raised portion with dorsal margins 

 weakly concave, the sinistral slightly the longer, leaving a median portion 

 with oblique distal margin forming about onc-tliird of the free margin, weakly 



