36 PROCEEDINGS OF THE CALIFORNIA 



Idotcp.a rectilinea. 



Body, slender; not increasing .in width backwards; all the segments of the 

 thorax equal in width, and the abdomen rectilinear, nearly as wide as the 

 thorax; first two segments of abdomen, distinct; total length of abdomen 

 about equal to that of last three thoracic segments; posterior extremity 

 obtusely pointed. Thoracic segments equal in length. Outer antennae, 

 long; the peduncle equal in length to the three first segments of body; 

 flagellum broken in both specimens. Color, various; one dried specimen 

 almost entirely black, the other with a black line down centre of body, the 

 rest of which is yellowish. 



Length, 0.80 inch. "Width, 0.17 inch. San Diego. 



Serolis carinatus. 



Thorax and abdomen conspicuously keeled upon the centre of every seg- 

 ment; the first segment slightly waved on its posterior margin, the curve of 

 the segments increasing rapidly, in such a manner that the last entirely en- 

 closes the free abdominal segments on their sides. Caudal segment rounded 

 at the extremity, with two marginal teeth on each side, at a considerable dis- 

 tance from the extremity, the central carina running the entire length of the 

 segment; last basal joint of inner antennas longer than r the flagellum; flagel- 

 lum of outer antennae much shorter than either of the two of the preceding 

 basal joints, and last basal joint about equal in length to the penultimate. 

 Eyes large, reniform, consjjicuous. The texture of the upper surface of a 

 dried specimen, under a two-thirds power, has a somewhat squamate appear- 

 ance. Color, a grayish brown, diversified with dots and irregular markings 

 of black; hands long and slender; dactylos equal in length to the manus. 



Two specimens from San Diego. Length, 0.21 inches; width, 0.16 inches. 



T. A. Blake read portions of a petition to Congress, from the 

 Boston Society of Civil Engineers, relating to the adoption of 

 the Metric system of weights and measures. 



On motion, the Chair was requested to appoint a committee in 

 regard to the memorial. 



The Vice-President informed the Academy that Dr. Gerhard 

 Kohlfs had kindly consented to lecture before the Academy 

 upon his travels in Africa during the years 1860 and 1867; the 

 lecture to be delivered the Monday following this announcement. 



On motion of Dr. Stout, Dr. Rohlfs was invited to become 

 the guest of the Academy during his stay in San Francisco. 



The judges of election reported having duly filed the certifi- 

 cate of election with the County Clerk. 



