OF THE 



VOL. III. BROOKLYN, MARCH, 1881. No. 11. 



Description of the larva of Platynus extensicollis, Say. 



By F. G. Schaupp. 



Length of fullgrown larva 8 mm; length of pupa 7 mm. 



Form elongate. 



Color. Base of antennae and anterior part of the head rufous, mouth- 

 parts, legs and the last three fourths of the anal appendage pale yellow, 

 head and thorax black, the scutes of abdominal segments above brown, 

 beneath lighter. 



Head hexagonal, constricted before the base, nearly as broad as long, 

 above slightly convex, angles rounded. 



Eyes small, sub-oval, six on each side in two rows, situated behind 

 the insertion of the antennae with two long bristles, one before the eyes, 

 the other behind. 



Antenna? fourjointed, inserted on the anterior angles, shorter than the 

 head, slightly longer than the maxillae, first joint stout, little longer than 

 the 2d, 3d and 4th, which are of equal length. The third is thickened 

 on the outside near the apex, the fourth is^the most slender; all are set 

 with a few long bristles. 



Mandibles arcuate with one tooth near base. 



Maxilla free. Upon the long cardinal piece are the usual append- 

 ages, the exterior (palpus) consists of four joints, first stout and short, sec- 

 ond somewhat longer, third and fourth shorter and more slender; the in- 

 ner (lobe) has two joints, the first stout, the second conical, much more 

 slender, mentum bilobed. 



