92 



large, brown, longitudinal spots on the thorax, the middle one 

 placed before the others, and continued behind by a very narrow 

 median brown line. Segments of abdomen brown centrally above; 

 pale at the margins and below. Antennse, legs, and balancers whit- 

 ish. Wings unmarked. One male taken is more distinctly marked, 

 and shows some dusky on the legs and ventral side of the thorax, 

 while the plumose antennae are decidedly blackish. 



Chironomus, larva (1). 



Large examples of this larva, average about .44 inch in length. 

 Head yellowish brown. Eye-specks two. Labium with strongly 

 arched anterior edge cut into about six black teeth on each side, 

 with a median tricuspid tooth. Posterior segments with three pairs 

 of fleshy (respiratory?) appendages; the first pair short and club- 

 shaped, attached at the posterior edge of antepenultimate segment, 

 the second and third pairs long and contorted, attached the one 

 to the middle and the other to the posterior edge of the penulti- 

 mate segment. The four anal papillee rather slender, enlarging a 

 trifle distally. 



Puppe constantly found in sand galleries with this larva have a 

 pair of strong frontal hooks and are provided with cottony respira- 

 tory tufts on the thorax. Length about .32 inch. 



These larvae and pupse were taken in numbers under rocks, a 

 short distance within the mouth of Cedar Creek. Young short- 

 nosed gars (jL. 'plaiysiomus) had invaded the creek from the bay, 

 and were busily probing the crannies and feeding on the insects. 

 One hundred and eighty-three larvre and forty-two pupae were 

 counted in the stomach of a single gar about nine inches long. 



Chironomus, larva (2). 



About eqiial to (1) in size. Head pale brown, uiider side black. 

 Tw^o eye-specks. Labium with four teeth on each side; median 

 tooth shorter than the two next it. Hairs of anterior pediform 

 appendage rusty. A single pair of small club-shaped (respiratory?) 

 appendages at posterior edge of the penultimate segment. Anal 

 papillae conspicuously enlarged distally. Less commoii than (1), 

 but more widely distributed. 



Localities: Willow Slough, Cedar Creek, Broad Lake, Wood 

 Slough. 



Chironomus. larva (3). 



Small; the largest of two examples taken, only .24 inch long. 

 A single eye-speck. Posterior segments without fleshy respiratory 

 appendages. Anal papil]«3 apparently jointed. 



One example each from Willow Slough and Cedar Creek. 



Chironomus, larva (4). 



A single very large larva, 1.38 inch long, from Ballard Slough, 

 seems to difl^er from all the preceding. Head black beneath; 

 eye-specks two. Labium with a large truncate median tooth, with 



