82 M:U \IIKK STATE 



peculiar family has but a single- genus, a singh- species, and is 

 represented b t \ but a sin:;!'- specimen. \\hich is m\\ in the I'nit.-d 

 JStatc-s National Museum. This family will fall in tin- couplet 

 with the C h i r o n o m i d a e in HP- key given by (.'omshu-k 

 (ISli-Vi, ami by NVillisi.ui (1896), bin differs from all the members 

 of this famih l.\ its peculiar \\ing \enaiinn i pi.:;:.. lig.JD). The 

 description of tip- family \\a> lirst given l>.\ Mr. ( 'oijiiillet I 



(1899a). 



'/'In- 



Tlu- eggs of most of the Ohironomidae are deposited 

 in \\aiei-; Mime species in s\\ih ibi\\iiig \\ ;l ier. uiiiers in sea or 

 lake walei-, while inosl id llienr lay them in stagnant pools or 

 JMtllds. or in slow l!o\\ilig si reams. The e--* of a ie\\ species are 



deposited iii bark, in manure, and in debris. Some species la,\ 

 them in strings resembling some\\hat a minatiire siring of load's 

 eggs; while others lay them in clumps. The eggs ihemselves are 

 elongate, cigar-shaped. iiMialh pointed at each end. Tlie_\ hatch 

 in a 1V\\ da\ - 



The 



The lar\ae an- \\orm-like, but vary somewhat in form with 

 the dill'erent genera. Most of them are aipmtie, while a few live 

 in the earth, in manure, or under bark i pi. Hi. lig.l ; pi. 17. tigs.l and 

 I: pi. !!. tig.!)). 



Kxcrptiug some of the I' e r a I o p o g o u they are provided 

 with both thoraeic ami anal proh-gs. and move by creeping in 

 a manner somewhat like a geometer larva, without, however, 

 such regularity, nor does the middle section hump up, but loops 

 irregularly to one side or the other. Many species are blood-red 

 in eolor, and hence are frequently known a.s blood-worms. They 

 have a distinct head with well-formed labrum, labium, epipharynx. 

 hypopharynx. mandibles and maxillae, the mandibles moving in 

 oblique planes. The body N distinctly segmented, usually with 

 twelve joints besides the head, the three thoracic segments being 

 but little thicker than those of the abdomen. The twelfth seg- 

 ment is provided with a pair of prolegs, some caudal setae and 

 blood gills: sometimes there are two pairs of conspicuous blood 

 gills upon the ventral surface of the eleventh segment also. The 



