CTDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 589 



Tcrminalia: Apical margin of genital capsule with a very shallow, 

 broad V-shaped emargination, surface impunctate except at lateral 

 angles; gonostylus as illustrated (fig. 265). 



Length of body: 6.34(5.86-6.66). 



Female: Very similar to male. 



Head: Length-width ratio, 0.98(0.94-1.02): 1.55(1.46-1.60); inter- 

 ocular width, 0.87(0.85-0.90). Antennal segments: I, 0.29(0.28- 

 0.30); II, 0.44(0.40-0.48); III, 0.39(0.33-0.44); IV, 0.52(0.46-0.56); 

 V, 0.63(0.60-0.70) Labial segments: I, 0.46(0.41-0.50); II, 0.81 

 (0.74-0.86); III, 0.64(0.60-0.69); IV, 0.47(0.44-0.50). 



Pronotum: Length-width ratio, L56(1.49-l. 62) :3. 19(3.07-3.30). 



Scutellum: Length-width ratio, 2.36(2.24-2.42): L96(1.89-2.02). 



Length of body: 6.33(6.04-6.73). 



Type data. — Walker's type of Aethus scitus (BrM) was listed as 

 coming from "St. Domingo," an early name for the Dominican 

 Repubhc. 



Specimens studied: 



Bahamas: South Bimini Island, June to August 17, 1951, C. and P. Vaurie, 

 6 males, 7 females (AmM; RCF). New Providence, Nassau, August 5, Clench, 

 1 male, 1 female (MCZ). 



Cuba: Guantdnamo, May 7, 1924, B. Hioram, 1 male (JCL). 



Haiti: Port au Prince, May 1925, 1 male (USNM). Fond-Parisien, Feb. 

 11-18, 1922, altitude about 60 feet, 1 female (AmM). Gros-Morne, Feb. 17, 

 1926, E. C. Leonard, 1 female (USNM). 



Hispaniola: "St. Domingo," 1 male (BrM), type. 



Discussion. — Personal study of Walker's type clearly showed that 

 Distant (1899, p. 222) was in error when he placed scitus as a synonym 

 of Pangaeus mar go, which is made a synonym of Pangaeus aethiops 

 in the present paper. One of the specimens had been labeled as 

 "Geocnethus cubensis Barber and Bruner," 



Dallasiellus {Ecarinoceps) laevis, new species 



Plate figures 176, 266 



Diagnosis.— The single setigerous puncture on the costa coupled 

 with the narrow, impunctate head and the mesopleural evaporatorium 

 extended to the side of the segment permits recognition of this species 

 within the subgenus. The narrow, very deep emargination at the 

 apex of the male genital plate (fig. 176) marks that sex from the 

 males of all other species within the genus. 



Description. — Male: Elongate-oval, widest across pronotum. 



Head: Length about two-thirds width, 0.84(0.80-0.86): 1.29(1.26- 

 1.30); interocular width, 0.77(0.74-0.80); anterior outline almost 

 semicircular, clypeus very slightly surpassing juga; surface gently 

 convex, impunctate, with weak radiating rugae and one submarginal 

 puncture in front of eye; ocelli moderate, separated from eye by space 



