Early Stages of Coleoptera. 335 



elliptical in longitudinal section and measures 5 mm. in length 

 by 2.5 mm, in breadth. 



The figures of the larvae are also apparently defective, the 

 head, in the figures given by Packard and Letzner being out 

 of all proportion to the body. Schaupp has correctly des- 

 cribed the head as small. 



Some doubt attaches to the specific determination of this 

 larva as two or three species of Gxriuus may often be found 

 in the same school. The specimens of beetles which I took 

 from the cells, though immature, seem to be G. -picifes and I 

 have accordingly described the larva under that name. I 

 consider it very doubtful if the larvae of G\rinus can ever be 

 specifically distinguished. 



I have given on Plate IX, Fig. 7, a representation of an un- 

 known larva of this family, 16 mm. in length. I am unable to 

 make a probable conjecture as to its identity- unless it is possi- 

 ble that the larvas of this family pass through a semi- pupal 

 metamorphosis, and in that case it may be a feeding larva of 

 D incut es assimilis or possibly one of the other species of the 

 same genus. It was captured close to the river bank at Inde- 

 pendence, Iowa, on the first of September, and has lived five 

 weeks in a tin box without food — refusing evervthing offered. 



DrsEUTEs assimilis Aube. Plate IX, Figs. S to 12. 



Color of larva dirty yellowish white, the meso- and meta- 

 thorax and dorsal portion of abdomen Hght slaty blue. The 

 head, especially the mouth parts, and the prothorax are tinged 

 with reddish yellow. Eyes black. The only distinct mark- 

 ings of any kind consist of two dark brown lines on the pro- 

 thorax, one curved, sub-basal, the other shorter, basal. 



Form, fusiform, not, or only very slightly flattened dorso- 

 ventrally. Entire length 25 mm. of which 3 mm. belong to 

 the abdominal appendages. 



Head subquadrate, somewhat narrowed anteriorly and pos- 

 teriorly, a V-shaped mark between the eyes. Frontal margin 

 (corresponding to labrum, but not separated by a distinct 



