250 NEW YORK STATE MUSEUM 



top of the leaf to the lower epideriiiis. This tunnel is often 

 several inches in length and winds about in all directions in a 

 serpentine manner. . . . From the front end of this tube 

 the insect extends its head and feeds. . . . The pupae are 

 apple-green in color, as are also the adults. Michigan. 



Five species of larvae of C h i r o n o m u s have been described 

 by Garman (1888). Of these No. 1 is probaibly identical with O. 

 d e c r u s ; No. 4 with plumosus ; the others are described 

 below. 



86. Chironomus sp. Garman 



1888 Garman. Illinois State Lab. Nat. Hist. Bui. 3 :160 



Larva "No. 2. Length about 10 mm. Head pale brown, under 

 side black. Two eye specks. Labium with four teeth on each 

 side; median tooth shorter than the two next it. Hairs of ante- 

 rior pediform appendage rusty. A pair of small club-shaped 

 (respiratory ?) appendages at posterior edge of the penultimate 

 segment. Anal papillae conspicuously enlarged distally. Illinois. 



87. Chironomus sp. Garman 



1888 Garman. Illinois State Lab. Nat. Hist. Bui. 3 :160 



Larva No. 3. Length about six mm. A single eye speck. Pos- 

 terior segments without fleshy respiratory appendages. Anal 

 papillae apparently jointed. Illinois. 



88. Chironomus sp. Garman 



1888 Garman. Illinois State Lab. Nat. Hist. Bui. 3 :160 



Larva "No. 5. A very small pupa (3 mm.) taken in August still 

 retained its larval skin, the labium of which differs from that of 

 the preceding larvae in lacking the median tooth. Its condition 

 would not permit of more extended comparison with the others, 

 and it may prove the same as (3) . 



Genus 39. Cricotopus V. d. Wulp 

 Tijdschr. v. Entom. XVI (LXX) and XVII. 132 

 Larva. iSmall, yellowish or green in color, the anterior abdomi- 

 nal segments stouter than the posterior ones. Eleventh segment 

 without ventral blood gills. Antennae, labium, epipharynx and 

 labium essentially like those of Chironomus. Maxilla with 

 a nuniber of mesad and cephalad projecting blades (pl.24, 

 fig.lm^). Mandible frequently transversely corrugated on its 

 convex surface (pl.24, figs. 4 and G). The anterior feet frequently 

 with coarse pectinate setae. 



