ART. 5. LARVAE OF CALENDRINAE COTTON. 7 



length. Labrum with ten simple thickened marginal setae. Epi- 

 pharynx with from eight to fourteen small setae between the epi- 

 pharyngeal rods, the number of these setae differing in the three 

 species. Maxillary mala oval at tip, with a longitudinal row of 

 six simple, stout setae on dorsal surface and with four simple setae 

 at tip, two of the latter being smaller than the others. Ligula not 

 setose. Hypopharynx fleshy and laterally lightly setose. Abdominal 

 terga above divided into two or three distinct areas. Abdominal 

 hypopleurum three-lobed. 



Genus COSMOPOLITES Chevrolat. 



Plate 4, figs. 1-7 ; plate 10, fig. 4. 



The larvae of the only species of this genus found in North America 

 breeds in the roots of tli^s banana. The larvae attain a length of at 

 least 13 mm. Labrum with twelve marginal thickened setae all of 

 which are branched. Epipharynx setose with two pairs of thickened 

 setae between the epipharyngeal rods. Maxillary mala oval at tip, 

 with a row of nine branched setae on dorsal surface and with one 

 branched and two simple setae at tip. Ligula with two somewhat 

 triangular setose areas on dorsal surface. Hypopharynx fleshy, 

 laterally densely setose. Abdominal terga above divided into four 

 distinct areas and an additional intersegmental fold. Abdominal 

 hypopleurum four-lobed. 



Genus METAMASIUS Horn. 



Plate 5, fig. 1-7 ; plate 10, fig. 6. 



The larvae of the species found in North America breed in the 

 roots of sugar cane. They attain a length of about 15 mm. Labrum 

 with twelve thickened marginal setae, some of which are branched 

 and others simple. Epipharynx somewhat setose, and with two pairs 

 of small thickened setae between the epipharyngeal rods. Maxil- 

 lary mala truncate at tip, with a row of eight many branched setae 

 on dorsal surface, and with one branched and two simple setae at tip. 

 Ligula densely setose on dorsal surface. Hypopharynx fleshy, lat- 

 erally densely setose, chitinized mental arms very prominent. Ab- 

 dominal terga above divided into four distinct areas. Abdominal 

 hypopleurum three or four lobed. 



Genus CALENDRA Clairville. 



Plate 6, figs. 1-7 ; plate 10, fig. 8. 



The larvae of this genus breed in the roots of many grasses and 

 grass-like plants. This genus contains many species, some of them 

 attaining a length of about 15 mm. Labrum with twelve marginal. 



