420 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iii 



Discussion. ^ — This species and bisinuatus, also described as new in 

 the present paper, are much closer to each other than to nigerrimus. 



Onalips nigerrimus (Dallas) 



Tlate figures 7, 31, 95, 119, 147, 205 



Acthus nigerrirmis Dallas, 1851, p. 112.— Walker, 18G7, p. 152.— St&l, 187G, p. 25. 

 Onalips nigerrimus Signoret, 18Slb, p. 323, pi. 10, fig. 43. — Lethierry and Severin, 

 1893, p. 64. 



Diagnosis. — ^The numerous, widely separated coarse punctures on 

 the pronotum and scutellum readily separate this species from the 

 other two in the genus. 



Description. — Male : 



Head: Length more than half of width, 1.60(1.43-1.69) : 2. 65(2. 34- 

 2.60); interocular width, 1.57(1.49-1.62); anterior outline a flattened 

 semicircle; juga surpassing clypeus and contiguous beyond it, with 

 numerous, irregularly^ spaced, coarse punctures, markedly tumid within 

 submarginal row of setigerous punctures; interocellar space smooth. 

 Antennal segments: I, 0.59(0.53-0.63); II, 0.50(0.50-0.50); III, 0.63 

 (0.60-0.63); IV, 0.83(0.80-0.86); V, 1.16(1.10-1.20). Labial seg- 

 ments: I, 0.94(0.93-1.00); II, 1.20(1.16-1.26); III, 1.20(1.13-1.33); 

 IV, 0.83(0.83-0.86). 



Pronotum: Length more than half of width, 3.05(2.85-3.30) : 5.59 

 (5.25-5.92) ; lateral setigerous punctures 7 to 11; transverse impression 

 postmedian, with broad, irregular band of coarse, sunken punctures; 

 anterior lobe punctured behind anterior emargination and laterally. 



Scutellum: Length and width subequal or one longer than the other, 

 length-width ratio, 3.30(3.00-3.75) :3. 26(3.00-3.45); surface polished 

 with numerous coarse, sunken punctures discally, these becoming finer 

 apically. 



Hemelytron: Usually distinctly duller than scutellum; abundantly 

 punctured on exocorium and mesocorium ; costa with 2 to 4 setigerous 

 punctures. 



Propleuron: With numerous coarse punctures on both convexities. 



Mesopleuron and metapleuron: As described for genus. 



Sternites: Polished, with numerous coarse punctures on lateral 

 third; some or all with one to three setigerous tubercles on lateral sub- 

 margin. 



Terminalia: Genital capsule shining, punctured laterally and at 

 base, apical margin sinuate medially; gonostylus as illustrated (fig. 

 205). 



Length of body: 10.16(9.21-10.95). 



Female. — Very similar to male, measurements averaging larger. 



Head: Length-width ratio, 1.77(1.69-1.90) : 2.61 (2.50-2.73); inter- 

 ocular width, 1.71(1.69-1.75). Antennal segments: I, 0.64(0.63- 



