Vol. XXvii] ENTOMOLOGICAL NEWS. IOI 



Phenacaspis spinicola n. sp. ; an apparently new 

 Coccid from Indiana (Hem., Horn.). 



By HARRY F. DIETZ and HAROLD MORRISON,* Indianapolis, 



Indiana. 



The following description of what seems to be a new species 

 of Diaspinae is published as a preliminary to a systematic paper 

 on the Coccidae of Indiana, which is now completed and will 

 be issued about the first of April. 



We have had some difficulty in deciding the generic posi- 

 tion of this species, but after a careful study of related species, 

 including the type of Phenacaspis and eight species of Chionas- 

 pis, have concluded that it should be included in Phenacaspis 

 Cooley. 



Phenacaspis spinicola new species. 



Scale of Female: Length 1.5-2 mm.; strongly broadened behind, 

 widest behind the middle, apex broadly rounded, sometimes more ir- 

 regular in shape, thin, somewhat convex, color normally white but 

 often gray or dirty gray; exuviae large, occupying fully one-third of 

 the total length of the scale, the first pale brown and shiny, the second 

 very light yellow and dull ; ventral scale well developed along the 

 edges, very thin or wanting in the centre, often remaining attached to 

 the dorsal scale. 



Scale of Male : Length about .8 mm. ; elongate, narrow, sides ap- 

 proximately parallel or slightly curved ; white, more or less distinctly 

 tricarinate, roughened above ; exuvia, pale yellow, occupying fully two- 

 fifths of the total length of the scale. 



Body of Female: Elongate, narrow, broader just in front of the 

 pygidium, distinctly segmented, cephalic segment almost' triangular, 

 apex rounded, the two segments preceding the penultimate segment 

 more or less distinctly constricted at the sutures. 



Pygidium of Female: Rather large, parabolic in shape; deeply in- 

 cised at apex by the sunken median lobes ; median lobes large, deeply 

 sunken into the pygidium, broad, the outer margins nearly straight, 

 then angularly curved to the median chitinous thickenings, inner mar- 

 gins strongly curved from base to apex, close together and parallel 

 for a short distance at base, distinctly crenulate, second lobes distinctly 

 divided into spatulate lobules, the inner more prominent than the med- 

 ian lobes, inner lobule of third lobes well developed, but broad, only 

 slightly projecting, with serrate margin; no incisions in the margin of 

 the pygidium; with a more or less distinctly hexagonal thickening on 

 the median line at the base of the median lobes, this deeply notched 

 caudally; no plates present, gland spines as follows: one just outside 



*The arrangement of the authors' names is alphabetical and indi- 

 cates neither seniority nor precedence. 



