REPORT OF THE STATE ENTOMOLOGIST 1 9 1 6 65 



Larva. Length 6.5 mm, diameter .2 mm. Head Ijght brown, 

 the thoracic segments variably chitinized, the thickened portions 

 reddish brown, the body segments whitish transparent. 



The head has a diameter posteriorly equal to the thoracic segments 

 and tapers anteriorly to an irregularly truncate apex bearing the 

 mouth-parts, the length being a little greater than the diameter. 

 Antennae short, stout, biarticulate, the basal segment with a length 

 a little greater than its diameter, the distal segment button-shaped. 

 The mandibles are decurved, moderately stout, triangular and with 

 two obscure teeth basally; maxillae decurved, broadly rounded 

 anteriorly and apparently with a series of four or five long, stout 

 teeth ; hypopharynx setose ; basally and ventrally there is within the 

 head a hyoidlike structure, the component rods being inserted at the 

 posterio- ventral margin of the exoskeleton of the head, their point . 

 of origin marked by lenticular, dark brown thickenings. 



The posterior two thoracic segments show clearly a median 

 triangular dorsal incision in the thickened portion and sublaterally 

 and ventrally, irregularly circular spots which are white; the chitini- 

 zation of the anterior segment is less evident and more skeletal 

 though otherwise not widely different. The spiracles on the anterior 

 thoracic segment are circular and with approximately eleven radiating, 

 nearly fused processes; the distal portion of the tracheae connecting 

 with the spiracles shows a distinctly stronger, yellowish chitinization. 



Abdominal segments 12, each with a length a little greater than 

 the diameter and with the posterior third separated by a constriction 

 as a subsegment; terminal segment more slender and tapering to 

 a sub truncate apex bearing the submedian posterior spiracles, 

 each circular and surrounded by a series of radiating hairs and, 

 as in the case of the anterior spiracles, the distal portion of the 

 tracheae is distinctly thickened and chitinized. 



Numbers of larvae, presumably of the same species, were received 

 the past summer from Mr F. C. Place, Baldwin, accompanied by 

 the statement that they were the apparent cause of a considerable 

 bleeding from Norway maples. The larger of these specimens 

 have tridentate mandibles, the teeth being moderately long, broad, 

 and obtusely rounded apically, with well marked sublateral ocular 

 spots near the posterior third. The larvae, variable in size, show 

 from 14 to 18 radiating processes in the anterior spiracles. These 

 variations may be as in Muscid larvae characteristic of different 

 larval stages. 



Pupa. Length 4.5 mm, diameter .9 mm, a variable yellowish 

 brown; eyes a pale yellowish red and portions of the anterior 

 thoracic segments a variable dark reddish brown. Wing cases 

 short, extending nearly to the second abdominal segment; leg 

 cases whitish transparent and reaching to the posterior third of 

 the second abdominal segment; the abdominal segments with 

 a transverse row near the anterior third of approximately six stout 

 subcorneal chitinized processes, and on the posterior third a similar 

 row, these processes alternating with those of the anterior row 

 and between each of them a series of three or four minute, chitinous 



