46 CALIFORNIA STATE COMMISSION OF HORTICULTURE. 



Female. Median lobes larger and more conspicuous in proportion to 

 the other lobes than is usual in this genus; usually parallel in general 

 direction, though sometimes slightly divergent; rounded or indistinctly 

 pointed at the extremities, firmly united at their bases, the chitinous 

 thickened process which unites them extending anteriorly for a dis- 

 tance about equal to the length of the lobes. Second pair distinct and 

 entire, but much smaller than the median pair; outer lobule smaller 

 than the inner. Third pair usually obsolete, but sometimes represented 

 by low serrate prominences. The gland-spines are arranged as follows: 

 1, 1, 1, 1, 1-2, 2-4. The first one is short and blunt, scarcely surpass- 

 ing the median lobes. Second row of dorsal gland-orifices represented 

 by the anterior group of 2-3 orifices. Third row with 3-4 orifices in 

 the anterior and 4-5 in the posterior group. Fourth row with 3-4 ori- 

 fices in the anterior and 4-6 in the posterior group. Median group of 

 circumgenital gland-orifices, 8-15; anterior laterals, 19-31; posterior 

 laterals, 13-23. 



Scale of Male. Length, about I mm. Sides nearly parallel, dis- 

 tinctly tricarinate. Exuviae yellowish brown, occupying about one third 

 of the length of the scale. 



On wistaria from Japan. (In quarantine.) 



Of the seven species of Chionaxpis found in California no single species 

 is considered a real pest. C. ortholobi* may be found the most plentiful, 

 but the host plant is not of much commercial importance. As to the 

 others, they are, in a majority of cases, held in check by parasites. At 

 times. C. pinifotix gets a good start on the pines, but is soon overtaken 

 by the parasite. 



Howardia bielavis Comst. 

 (Mining Scale.) 



Scale of Female. Very nearly circular; the exuviae are marginal, 

 and project beyond the edge of the scale 



Female. The characters presented by the last segment of the female 

 are as unusual as those presented by the scale. The pores on the dorsal 

 surface of the segment are very small. Scattered over the ventral 

 surface are numerous minute spines. The groups of spinnerets are 

 wanting. The mesal lo.bes are large, oblique, nearly twice as broad 

 as long; approximate at the base; the mesal margins diverge slightly, 

 distal margin serrate; mesa- distal angle rounded and produced into a 

 lobule. The second lobe is very small, being simply an angular pro- 

 jection of the body wall. The third lobe is about three times as wide 

 as the second lobe; but it projects only a little beyond the margin of 

 the segment. The plates are simple and spine-like. There are two 

 minute ones between lobes; two between first and second lobes; two or 



