No. 1.] ATTID.E OF CENTRAL AMERICA. 85 



The spider is black with seven transverse white bands, 

 three on the cephalothorax and four on the abdomen. The 

 posterior band on the cephalothorax is not so distinct as 

 the others. The cephalothorax has also white bands on the 

 sides. On the abdomen the edges of the bands are tinged 

 with orange. The legs and palpi are light yellow. The falces 

 are black. 



We have two females, one from Refugio, Mexico, and one 

 from La Blanca, Texas, sent to us by Mr. C. H. Tyler Town- 

 send. 



SHIR A, GEN. NOV. 



Long slender spidei's of medium size. 



The cephalothorax is long and moderately high, and is 

 widest behind the dorsal eyes. The upper surface is gently 

 convex, there being a slight rounded fall both in front of and 

 behind the dorsal ejes. After the first third the thoracic part 

 falls_ more steeplj^ The sides are nowhere vertical, and slant 

 outward more widely in the thoracic than in the cephalic part. 

 The quadrangle of the eyes is a very little wider in front than 

 behind, is scarcely wider than long, and occupies one-half of 

 the cephalothorax. The anterior eyes are a little separated, in 

 a straight row, the middle being more than twice as large as 

 the lateral. The second row is plainly nearer the first than 

 the third row. The third row is plainly narrower than the 

 cephalothorax at that place. 



This genus is related to Anoka and Sadala, but is higher 

 and not so flat, with a longer cephalic part. Ashtabula, which 

 has the cephalic part as long as the thoracic, is still lower and 

 flatter. 



We have only the species described below. 



