200 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 1 37 



Lab, labium. 

 Lac, lacinia. 

 M, muscle (s). 

 Ma, antennal muscle. 

 M ab Md, mandibular abductor muscle. 

 M ad Md, mandibular adductor muscle. 

 M an, annular muscle (s). 

 M Cib, dilatores cibarii. 

 M C S, muscle of salivary pump. 

 Md, mandible. 



Mes, premandible or messorial. 

 M Lac, lacinial muscle. 

 MLE, labroepipharyngeal muscles. 

 M Ph vl, pharyngeal ventral and lat- 

 eral dilators. 

 M Prm, premental muscle. 

 Mrao, retractor angulorum oris. 

 M Sti, stipital muscle. 

 M Sto, stomodeal muscle. 

 M Th cr, thoracocranial muscle. 

 MTo, tormal muscle. 

 Mx, maxilla. 

 NA, antennal nerve. 

 N Fr, frontal ganglion connective. 

 N R, recurrent nerve. 

 Pa, palpus. 



P E, epipharyngeal comb. 



Ph, pharynx or pharyngeal. 



phch, hypochilan comb. 



Phr, phragma. 



PI Mx, maxillary plate. 



Prm, prementum. 



psr, "pseudoradula." 



S IS IV, labral sensory setae ("Sen- 

 sillae labri," Zavfel). 



Sg, subgena. 



Slbi, labial seta. 



SMx, maxillary setae. 



SOe, suboesophageal ganglion. 



Sp, suspensorium. 



spi, labral "spinula" (Zavrel). 



Sti, stipes. 



T ad Md, tendon of mandibular adduc- 

 tor muscle. 



To, torma. 



tr, centroepipharyngeal trapezoidal 

 piece. 



Trao, tendon of the retractor angu- 

 lorum oris. 



Tt, tentorium. 



U, centroepipharyngeal U-shaped 

 piece. 



The arable figures designate the cephaHc sensory setae. 



REFERENCES 



I have listed only the most important papers relative to the subjects treated 

 in this memoir. A more complete bibliography is given by Gouin (Ann. Soc. 

 Ent. France, 1957), and for the Chironomidae by Thienemann (1954). Papers 

 referred to in the text which do not appear in the following list can be found 

 in one of the above-mentioned sources. 



Anthon, H. 



1943. Der Kopfbau der Larven einiger nematoceren Dipterenfamilien. Spol. 

 Zool. Mus. Hauniensis, vol. 3, pp. 1-61. 

 Gouin, F. 



1957. fitudes sur I'anatomie de la tete lavaire de quelques Chironomidae 

 (Dipt. Nematoc). I, Les structures Chironomines. Ann. Soc. Ent. 

 France, vol. 125, pp. 105-138. 

 Kettisch, Joh. 



1936-1937. Zur Kenntnis der Morphologic und Okologie der Larve von 

 Cricotopus trifasciatus. Konowia, vols. 15, 16. 

 Madwar, S. 



1937- Biology and morphology of the immature stages of Mycetophilidae 

 (Dipt. Nemat). Philos. Trans. Roy. Soc. London, ser. B, vol. 227, 

 No. 544, pp. i-iio. 



