92 COLOMBIAN DERMAPTERA AND ORTHOPTERA 



Surface smooth and shining. Head deep chestnut, shading back of eyes to 

 sanford's brown, the caudal portion of the occiput being solidly this color. 

 Pronotum, tegmina, and remaining dorsal surface, including forceps, black 

 with a chestnut luster, ventral surface of abdomen paler, showing a stronger 

 chestnut coloration. Other underparts ochraceous orange. Limbs ochraceous 

 orange, except at knees where they are very briefly but strikingly suffused with 

 chestnut. 



The type is unique. 

 Psalis compacta new species (Plate XVI, figs. 2 and 3.) 



This insect is readily distinguished from dark examples of P. 

 americana having abbreviate and truncate tegmina, by the more 

 robust build, shorter head, pronotum, tegmina and forceps, less 

 hairy antennal joints and forceps in both sexes; the latter, though 

 of the same general type, agreeing more closely with the type 

 developed in Euhorellia annulipes and other species of that genus. 



In addition to other less striking features, compacta differs from 

 P. apolinari in having quadrate tegmina, immaculate and much 

 shorter limbs, pronotum with caudal margin less transverse and 

 differently armed forceps. 



In general appearance this insect is strikingly like an excep- 

 tionally large species of Euhorellia, having the antennae not an- 

 nulate and quadrate tegmina. Numerous features, however, of 

 which the metatarsal armament is the most important, show the 

 species to be a member of the genus Psalis. 



Type. — cf ; Soacha, Cundinamarca, Colombia. Elevation, 8800 

 feet. June 17, 1904. From A. Maria. [Hebard Collection, Type 

 No. 442.] 



Size and form much as in apolinari, but with abdomen, though Inroad, ex- 

 panding somewhat less. Head proportionately not as large as in americana 

 or apolinari, sutures represented by faint lines, occiput smooth and convex.^ 

 Eyes small, much shorter than cheeks. Antennae with (fourteen to sixteen 

 in the series) joints moderately supplied with microscopic hairs, this covering 

 not as heavy as in americana, much heavier than in apolinari; first joint eloii- 

 gate and slender, three-quarters as long as width between antennal sockets; 

 second joint minute, length less than width; third elongate, slender, slightly 

 over twice as long as greatest (distal) width; fourth slightly longer than 

 greatest width; succeeding joints increasing in length distad, relatively shorter 

 than in americana or apolinari. Pronotum subquadrate, surface weakly 

 convex proximad where the medio-longitudinal sulcus is strongest; lateral 



^ In the series occasional individuals show brief and weak linear impressions 

 parallel to and laterad of the medio-longitudinal suture. 



