168 THE CANADIAN ENTOMOLOGIST. 



Chrysalis. — Compact, fairly cylindrical, narrower cephalad ; rounded, 

 bluntly-tapering caudad. Truncated in the dorso-cephalic plane. Meso- 

 thorax with a low median dorsal prominence. Cremasteric area circular, 

 provided with numerous minute hooklets, the latter with two curved prongs. 



The chrysalis, except over wing, tongue, leg and eye-cases, is entirely 

 covered with minute processes. Under magnification (55 diam.) these are 

 seen to be wine-gUss-shaped, the rims made up of tiny finger-like projec- 

 tions extending upwards and outwards in a circle. I could discover no 

 hairs on the surface of the chrysalis, these processes evidently replacing 

 them. 



The colour is very variable, hardly any two alike ; often some shade 

 of green (nile, blue, pale or merely tinged), or over the green on wing- 

 cases and dorsum there may be a slight sprinkling of black or brown 

 atoms, which may increase until the whole chrysalis is well covered with 

 atoms and blotches, or the green may be lacking, and the colour then is 

 black or brown (Roman sepia), or even as in one case, a purple-madder. 

 The subsiigmatal and the two lateral, wavy, vvhite bands of the caterpillar 

 can sometimes be traced in the chrysalis, varying in colour, of course, 

 sometimes white (particularly with the green forms), again as rows of black 

 or brown specks. 



The spiracles are white, with a faint yellowish tinge ; thoracic elon- 

 gate-oval, abdominal oval. 



Length, 8.5 mm. to 10.25 mm. Greatest width about 4 mm. at tips 

 of wing-cases. 



THE CHALCIDOID PARASITES OF THE COCCID KERMES 



PUBESCENS BOGUE, WITH DESCRIPTIONS OF TWO 



NEW GENERA AND THREE NEW SPECIES OF 



ENCYRTIN^ FROM ILLINOIS. 



BY A. A. GIRAULT, URBANA, ILL. 



From a single small lot of specimens of this common coccid of the 

 oak — Kermes piibesceiis Bogue — gathered from the twigs of a single tree 

 on the campus of the University of Illinois at Urbana, during the summer 

 of 1908, the following chalcidoid parasites were reared, several of which 

 appear to be undescribed. The oak was a species of the alba group. So 

 far, I believe, but a single parasite of this coccid has been recorded in the 

 literature ; this paper adds at least three others, two representing new 

 genera, and all belonging to a single subfamily, the Encyrtin?e. 



May, 1911 



