253 Wisconsin Academy of Sciences^ Arts and Letters. 



SIMONELLA AMERICANA Peckham. 1885. 

 Plate XII, figure 4. 



Simonella americana P., Proc. Nat. Hist. Soc. of Wisconsin, p. 24. 



$ . Total length 8.5 mm. Width of of abdom.en 1.1 mm. 



Length of cephalothorax 3.5 moi; width 1.4 mm; height 1.2 mm. 



Legs 3.8, 3.6, 4, 5.3. 



Cephalothorax nearly as high as wide; cephalic and anterior thoracic parts 

 higher and more convex tlian the remaining portion of the thoracic, 

 from which they are separated by a well-marked constriction; that 

 part of the thorax posterior to the constriction is highest in the mid- 

 dle, and slants off to form the narrow pedicle by which it is united 

 to the abdomen. The cephalic and anterior thoracic parts are jet 

 black and glabrous; the posterior thoracic part is pale yellow. Eyes 

 of first row more than twice as large as those of the second; second 

 row wider than the first; third row nearer the second than the fourth; 

 eyes of fourth row about as la,rge as those of second and further 

 apart. 



Clypeus less than one-half as high as anterior eyes, retreating; ridged above; 

 color black. Palpus black, long and slender, having on outer side 

 of tibia a stout apophysis. Falces robust, narrowing toward the tip, 

 long, vertical, slightly diverging; fang as long as the palpus, slender, 

 yellowish black in color. Maxillae yelowish black, half as long as 

 palpus, more than twice as long as labium; widest at tlieir extremi- 

 ties. Labium as w^ide as long, truncated at tip. 



Sternum yellowish, long, truncated in front, narrowing to a point behind. 



Legs with weak tibial and metatarsal spines on the first pair; second, third 

 and fourth pairs unarmed. Patella and tibia of the third, shorter 

 than patella and tibia of the fourth; metatarsus and tarsus of the 

 fourth, shorter than patella and tibia of the fourth. Patella, tibia 

 and metatarsus of the first black on the inner side; otherwise all the 

 legs are yellowish with a darker shading toward the distal ends of 

 of those of the fourth pair. Abdomen made up of three parts, the 

 middle part being a narrow neck which joins the anterior and pos- 

 terior portions. The anterior is twice as long as the middle, and half 

 as long as the posterior part. 

 Habitat: Guatemala. 

 This species was found running on the ground among leaf -cutting ants. 



