l62 CALIFORNIA ACADEMY OF SCIENCES. 



segment, with its lateral margins black. Sternal mark- 

 ings composed of a small trapezoid on prothorax with 

 the posterior angles produced, and a broad blotch on 

 metathorax; the anterior coxae are produced forward and 

 backward into broad lobe-like appendages, rounded in 

 front and angulated behind. Legs concolorous with 

 ground color of the body, with darker margins. 



Abdomen, elongate ovate, with one long hair and sev- 

 eral short ones rising on margin just in front of each 

 uncolored posterior angle, and a series of hairs along 

 posterior margins of segments; segments 1-8 with a 

 broad, transverse, fuscous band darker at lateral extremi- 

 ties and black on extreme lateral margins; segment 9 uni- 

 formly colored, broadly rounded with narrow, uncolored, 

 fringed, posterior margin. 



Menopon loomisii n. sp. (Plate xv, fig. 6.) 



Specimens taken from two specimens of the White- 

 winged Scoter, Oidemia deglandi (Bay of Monterey, 

 California). Named after Mr. Leverett M. Loomis, Cura- 

 tor of Birds, California Academy of Sciences. 



Decription of female. Body, length 1.8 mm., width 

 .84 mm.; pale golden brown to pale chestnut brown. 



Head, length .3 mm., width .56 mm.; semilunar with 

 evenly rounding front, shallow ocular emarginations, and 

 rounded posterior angles; occipital margin concave; palpi 

 projecting by the length of the last segment; the antenna? 

 when outstretched projecting beyond the margin of head 

 by the length of the last segment; a pair of very small 

 hairs in middle of front, a longer one on side followed by 

 a very short one, and then two or three longer ones in 

 front of the emargination ; the ocular fringe composed 

 of few but rather strong hairs longer than usual; tem- 

 poral margins with three very long hairs and two more 

 on occipital margin of the produced temples; four addi- 



