INSECT NOTES. 33 



iDack of each antenna is a slender, flexible spine. Here and 

 there upon the body may be seen a minute bristle ; at the caudal 

 end are the two black spiracles, dorsad of which are 4 finger- 

 like processes and ventrad are 2 conical protuberances. 



The pupa is brown in color; ^4 to % of an inch in length. 

 On the anterior part of the thorax on the dorsal surface are the 

 breathing organs, slender, transversely striated, about 3-32 of 

 an inch in length. Each intermediate abdominal segment has 

 8 pairs of sharply pointed conical protuberances, those on the 

 posterior part of the venter on the middle line larger than those 

 on the mid-dorsal line and much larger than those on the sides. 

 The last segment has but 4 and the next to the last 8 such pro- 

 jections. On the anterior segments some may be much reduced 

 01' even wanting. 



The adults show considerable variation in coloring, there 

 being a light and dark form of each sex. Between these forms 

 are several specimens showing more or less intergradation. 



Male. Dark form. Shining black ; the tips of the basal 

 antennal joints, the tips of the antennal branches, of which there 

 are four rows, knob of halteres and the palpi more or less fus- 

 cous ; the fore legs, the tibiae and tarsi of the middle legs to- 

 gether with the middle section of the femora, the hind tibiae 

 and tarsi, and the dorsal portion of the collar are yellow ; wings 

 deep blackish brown, except for the hyaline spots on the veins 

 bounding proximally and distally the discal cell and one at the 

 stigma (fig. 14). 



Pale form. Shining reddish yellow excepting an occipital 

 triangle, the humeri, base of metanotum, thoracic and pleural 

 sutures, narrow lateral and hind margins of the more posterior 

 segments, dorsal spot on the first segment, and forceps them- 

 selves, tibial spurs and apical fourth of middle and hind femora 

 are black. Wings yellowish, subfuscous apicallv. 



Female. Dark form. Like the male but the basal antennal 

 joints, the collar and the whole of the middle femora are black : 

 the lateral posterior margin of the fifth segment of the alidomen 

 and the tip of the ovipositor are yelUnv. 



Pale form as described by Osten Sacken. ( L^i 743.) 



