MAY FLIES AND MIDGES OP NEW YORK 239 



the anal segment cordate, a third shorter than the one imme- 

 diately preceding; forceps brownish yellow, slender and pointed; 

 the hairs on the sides yellowish; abdomen of the female dark gray, 

 with whitish incisures. Legs yellow with brownish articulations ; 

 the last two tarsal joints darkened; tarsal proportions as m 

 p 1 n m o s n s ; male fore tarsi hairy. Halteres yellow. Wings 

 with a slightly yellow tinge, whitish in reflected light; the cross 

 yein dark^brown. Length 9 to 12 mm. Washington State. 



60. Chironomus decorus n. sp. 



(P1.23, figs. 7 to 13; pl.29, fig.l2) 

 Larva The laryae were found eyerywhere in the ponds and 

 ditches around Ithaca N. Y. They are blood red, and about 

 12 mm long. The head is dark blackish brown; the antennae 

 are short normal. The dorsal sclerite is narrow oyate, posterior 

 end pointed, truncate anteriorly, with three seta^ along each 

 lateral margin, the first at the extreme anterior end, the last one 

 half way between the anterior and the posterior end, the second 

 midway^ between these. Articulated to the cephalic margin, and 

 oyerhanging the mouth opening is the labrum. There are two 

 pairs ot prominent setae upon its dorsal surface; numerous 

 papillae, two or which are quite prominent on the anterior 

 maroin and upon the anterior yentral surface. The arnmge- 

 meiit of the setae and the armature of the epipharynx shown 

 in fio-10. The epipharyngeal comb (c) has relatiyely long and 

 uniform teeth; the lateral arms are dark brown in color. 

 Fach eye consists of two distinctly separated pigment spots. 

 The mandibles (fig.7) are black-tipped, with a fringe of apical 

 setae p ].romiuent lateral spine, and a group of mesad pro- 

 iecting branched setae; the hypopharynx has its usual papillae 

 upon the fore margin; the maxillae are prominent, each with two 

 lateral setae the palpus is short and thick. The labium has a 

 black margin with an outline as shown in fig.8. In many speci- 

 mens the teeth appear to be slightly longer in proportion than 

 shown in this figure. The anterior prolegs haye yery numerous 

 curyed setae. The body is nearly deyoid of eyen minute setae. 

 The anal prolegs are normal, claws dark, bilobed. Anal setae as 

 usual The eleyenth body segment has four long white blood gills 

 on the yentral surfa.-c, and caudad of the dorsal setae of the 

 twelfth segment are four short ones. 

 The larya (1) mentioned by Oarman (1888) is probably this 



species. „ ,, . , 



Pupa Dusky oreenish brown, the colors of the imago showing 

 throu-h the inteffument. Length 7 to 8 mm. Tracheal filaments 

 prominent, white and much branched. Thorax with a few scat- 



