;-)12 THE CANADIAN ENTOMOLOGIST. 



Papaipema (Goriyna) eiipatorii, Lyman. — -This newly-described 

 species was encountered in the larval state in the New Brighton section, 

 establishing the fact, that, like most other species, it is widely disseminated. 

 It is quite distinctive in both moth and larva, being easy of recognition, 

 especially as the food-plant does not seem to be popular with many other 

 species, and it is certainly one of the nice things recently exploited. The 

 larva has the happy trait of pupating in the food-plant, thus offering an 

 extended period for securing it. Were parasites less destructive it would 

 be easiest to let them thus remain and simply gather the pupae. But 

 Eupatorium is an ungiinly plant to transport, and if left to mature afield 

 but a very small percentage remain unaffected, hence it is not so easy to 

 get it in numbers as some other species. An exit aperture, similar to the 

 wnik of imperiurhata, is made, for the stem rarely falls so as to be broken 

 off, and the larva is carefLil to plug the great hollow stalk with dried bits 

 above, so the moth must use the door, and not make the mistake of 

 crawhng up the interior. 



'J^he following will sufficiently characterize the larva, which has not 

 been descril)ed : Head 2 mm. wide, rather smiU for the stage and size of 

 larva ; yellow and shining, as is the shield. Mouth-parts and ocelli only 

 are black. Body tapers both anteriorly and posteriorly slightly ; colour 

 pale dull sienna. Lines are wide, pale cream colour, indistinct for the 

 stage, none seem to cross the first four abdominal segments. An earlier 

 stage might prove the dorsal to be continuous, but there is so little 

 contrast at present it cannot be made out. Tubercles are very weak and 

 concolorous, though III and IV can be made out, except on joint ten, 

 where III, directly above the spiracle, is a minute dot. On this joint IV 

 is transparent and normal ; there is no accessory \N a above it. Spiracles 

 very small, the merest dots, but are black, as is usual. Anal plates small. 

 Length, 35 mm. 



Mature larva : As before, except that the shade is a creamy-white. 

 The body is very perceptibly thickened centrally. No change in plates. 

 A primitive larva that one would hardly think belonged to this genus at 

 first glance. Length, 37 mm. 



The pupal change occurs in the first days of August, and the pupa 

 is more cylindrical and less tapering than its close allies. On the front is 

 a very slight ridge, though this is not toothed as in necopina. One speci- 

 men only had the very faintest spur. The anal extremity is comparatively 

 blunt. Moths emerge September 20th to 28th. The male structures 



