148 Forty- FIFTH Report on the State Museum. 



tenetJ, with its longest diameter exceeding its transverse by about one- 

 half. The cocoons differ perceptibly in size, but average one-tenth of 

 an inch in length, — ten taken at random measuring just one inch. 



Opening a few of the cocoons on October 12th, somewhat more 

 than half had changed to pupne. These agreed with the descrip- 

 tion given of this stage by Dr. Riley in his Report for 1885 [loc. cit.), 

 but diffei'ed in the examples examined from his figure (see c in figure) 

 in that the leg-cases reached quite to the tip of the abdomen, even when 

 straightly extended, instead of only to its sixth segment. 



The larvop that were planted out of doors have not been examined, 

 but it is probable that they will hibernate in the larval stage. 



At Washington, the winged midge was obtained from examples bred 

 in the warmer temperature of the vivarium during the months of Jan- 

 uary and February,* while others, presumably under natural exposure, 

 emerged from April 10th to 13th. Their usual time of appearance is 

 probably coincident with the putting out of the blossom buds of the 

 pear. 



The Winged Insect. 

 The general appearance of the midge is represented in Figure 6. Its 

 more conspicuous features, borrowed from Dr. Riley's detailed descrip- 

 tion, are these: The male. Average length, one- 

 tenth inch; general color, dark gray or black; eyes, 

 deep velvety black; antennae, one- fifth longer than 

 the body, black, with twenty-six globose joints; 

 thorax, dark dull gray or black, with two diverging 

 rather indistinct gvay stripes, and beset with long 

 . , ^-x yellowish hairs; wings, slightly smoky, darker 

 X^NjCT/ '^^i^^*^ ^^^^ covered with a sparse black pubescence, 

 6^^^^^^ and having a black fringe; halteres, or balancers, 

 ^maie%';S-''Se,Diplo' pale yellow; legs, dusky with a yellowish tinge; 

 RUeyo'''''"''^' ^^"®'' abdomen, dark gray, almost black dorsally, ter- 

 minating in a pair of two-jointed claspers, shown in enlargement in 

 Figure 10, in which b ai'e the claspers and c the intromittent organ. 

 Female, 0.13 in. long, exclusive of ovipositor, which extended is as 

 long as the abdomen. Antennae, foui'teen-jointed, slightly longer than 

 the head and thorax together. General color somewhj;,t lighter than 

 the male. 



The Egg'-laying'. 

 I know nothing, personally, of the oviposition of the midge, nor have 

 I knowledge of any other record of it than what is based on Schmid- 



♦Schmidberger had it emerge as early as the 38th of December. 



