THE CANADIAN ENTOMOLOGIST 149' 



empty, dipterous pupal cases projecting from these areas and narrow oval cells 

 beneath the infested parts of the stems. Most of the discolorations were on 

 the lower half of the stem and many were only five or six inches above the 

 ground. Practically all of the adults had emerged when the infestation was 

 noted, but on August 6 an adult was secured and sent to Dr. Felt, who found 

 that it represented a new species. He very kindly drew up the following 

 account and description which is published with his permission. 



"Lasioptera apocyni n. sp. 



This one midge reared was received under date of August 9, 1920, from 

 H. B. Weiss, Trenton, N.J., accompanied by the statement that the insect had 

 been reared from dogbane, Apocynmn androsacnnfolhim.. The specimen was 

 labeled 'New Brunswick, N.J., from stems of dogbane, August 6, 1920.' This 

 species approaches L. inustormn Felt from which it may be easily distinguished 

 by its smaller size and different coloration. 



Gall.. The gall is an irregularly oval, dull reddish orange stem discoloration with 

 a length of 1 cm. and a diameter of .3 cm. Narrowly oval cells may be found 

 just beneath the surface of the aft'ected parts of the stem. 



Female. Length 1mm. Antennae hardly reaching to the base of the abdomen, 

 sparsely haired, dark brown, 21 segments, the 5th with a length about three- 

 fourths its diameter, terminal segment somewhat producd with a length one- 

 fourth greater than its diameter, the tip broadly rounded. Palpi, first segment 

 short, subquadrate, the second with a length nearly twice its diameter, the third 

 one-fourth longer than the second, more slender, and the fourth a little longer 

 and more slender than the third. Mesonotum dark reddish brown, scutellum and 

 post scutellum reddish brown. Abdomen dark brown, the segments narfowly 

 margined posteriorly with white scales. Ovipositor with a length about half 

 that of the abdomen, the basal portion moderately long, the lobes narrowly oval, 

 with a length three times the width, sparsely haired; wings hyaline, the discal 

 spot small and at the basal half. Halteres whitish transparent, yellowish orange 

 basally. Coxae and base of femora dull yellowish orange, the distal portion 

 of femora, tibiae and tarsi apparently a nearly uniform dark brown. Claws 

 rather long, slender, unidentate. Type A 3141 N. Y. State Museum." 



On August 10, a parasite was bred from the infested stems, which was 

 identified by Mr. S. A. Rohwer, .through the courtesy of Dr. L. O. Howard, 

 as a species of Tetrastichus. 



Aiiinialo tenera Hubner (Lep.) 



This is one of the tiger moths and a common species in the Atlantic States, 

 the larva feeding on the foliage of dogbane. Tn the northern and middle sections 

 of New Jersey, the moths are most plentiful in the vicinity of dogbane about the 

 middle of June, at which time eggs are deposited. The larvae feed during the 

 night or at dusk and hide by day at the bases of the plants. Under the name 

 Euchactcs coUaris Fitch, various references are given to this species by 

 Edwards (Bui. 35, U. S. Nat. Mus.). Among these, Jewett (Can. Ent., vol. xii., 

 p. 22cS, 1880) states that at Dayton, Ohio, the larva fed on Asclepias incarnata 

 and refused A. cornuti, while Van W'agener (Can. Ent., vol ix., pp. 170-171, 

 1877) gives dogbane as the food plant, stating that the larvae will in confinement 

 feed on Asclepias, but that he never found but one larva on Asclepias in the 



