50 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



twice as high as ventral plate, inner angle somewhat pointed, rough, 

 external part somewhat curved, the tip a little produced, rough; pos- 

 terior plate sickle-shaped, the end slender and sharp, serrated beneath 

 at about the middle. Length of body, 45 mm ; width, 5 mm . 



Habitat — Ukiah, California. 



I have examined one male of this species from the above locality, 

 which was collected by Mr. James K. Burke. 



8. Spirobolus hebes sp. no v. 



Dark ochreous brown, segments not edged with a different color; a 

 lateral row of small black spots; feet lighter. Robust, not attenuated ; 

 the anterior 2-5 segments somewhat crassate, not smooth. Vertex 

 smooth, sparsely punctate, median sulcus interrupted ; clypeal foveolse 



8. Antennae short, about reaching the posterior margin of anterior 

 segment. Eyes distinct, subtriangular, sides rounded; ocelli 29-38, 

 arranged in 6 series. Segments 39-41. First segment acute, more so 

 in male than female, margiuate, rather smooth ; second segment strongly 

 produced beneath, triangular and rounded. Other segments not smooth, 

 sparsely punctate, also numerous impressed lines, striae moderate, 

 strongly decurved beneath. Last segment obtusely rounded, moder- 

 ately smooth; anal valves not marginate; anal scale rounded. Repug- 

 natorial pore small, placed in the anterior division, suture angularly 

 bent. Pairs of feet, 76-79, not extending beyond the sides of body. 

 Male: coxae of the 3-6 pairs of feet produced more than the others; tro. 

 chanter of the first and second pairs large, as well as the two anterior 

 pairs of legs are stouter than the rest. Ventral plate smooth, triangu- 

 lar, somewhat swollen near the outer edge. Genitalia: inner part of 

 the anterior plate twice as high as the ventral plate, end rounded, nu- 

 merous short tubercles on the anterior surface, outer part finger-like, 

 moderately wide, end rounded and not turned outwards, smooth; pos- 

 terior plate thick and somewhat curved, a short blunt lobe at base on 

 the inner side, above this a sharp and thin one, the end small, thick 

 and rounded, beneath produced into two serrated plates. Length of 

 body, 45-50 mm ; width, 7-8 mm . 



Habitat — San Diego, California. 



This species is described from a male and a female, collected by Miss 

 Rosa Smith. 



9. Spirobolus oalifornicus (Humbert and Sausaure). 



Spirostreptus caUfornicus Hunib. & Sauss., Revue et Mag. Zool., 177, 1870 

 (California). 



Black, segments not edged with rufous, feet and antennas not or 

 scarcely paler. Robust, not attenuated before, a few of the anterior 

 segments crassate, not smooth. Vertex rough between the eyes, smooth 

 elsewhere, a few wrinkles in front, median sulcus interrupted ; clypeal 

 foveola* 8. Antenna?, moderate, reaching the posterior border of ante- 



