NORTH AMERICAN COLEOPTERA. 



Description of Larva. 



Form robust, convex, the ventral surface flat, gradually narrower from the 

 prothoracic to the last segment, the last four segments recurved, their ventral 

 surface in contact with that of the pi-eceding segments ; color whitish, con- 

 sistence soft. 



Segments twelve ; three thoracic, nine abdominal. 



Prothorax large, massive, somewhat narrowed in front, flat above, yellowish 

 white, a dorsal and two lateral fuscous spaces, the latter including an elevated 

 serrate line ; spiracle large, fusiform in outline. 



Meso- and Metathoracic segments consisting of a dorsal and infero-lateral 

 piece, the latter as seen from the side larger ; these segments without spiracles. 



Abdominal segments. The first two consist of two dorsal pieces, the division 

 indicated by a fold merely, the spiracles in these segments smaller than the pro- 

 thoracic and situated in a rhomboidal depression between the dorsal and infero- 

 lateral plates ; segments three to eight gradually less distinctly divided on the 

 dorsal portion, the spiracles in each gradually smaller and situated at the lower 

 end of the dorsal division. Last segment obtusely ovate, scarcely plicate dor- 

 sally and without spiracle, the anal opening ventral and longitudinal. 



Spiracles. Of these there are nine on each side, all functional ; the first is 

 situated at the side of the prothoracic segment, tlie others in the first eight 

 ventral segments ; they gradually decrease in size from the first to the last. 



Legs on the three thoracic segments nearly equal, with four articulations, the 

 femoral piece longer, the tibia terminated by a small cleft claw, the under por- 

 tion of which is short ; surface of legs rather hairy. 



Head very deeply inserted in the prothorax ; the exjiosed portion dark chiti- 

 nous, the internal ovate flattened on the under side, the anterior margin of head 

 forming a thickened projection, the clypeus hemi-hexagoual with a chitinous 

 border. 



Labrum transverse, ciliate, the anterior margin arcuate. 



Mandibles stout, pjTamidal, the apices chisel shaped, transversely wrinkled 

 above ; behind the base of the mandibles an oval tubercle of the side of the head. 



Maxilla with a large, irregularly quadrangular, basal piece, surmounted by 

 an oval lobe, the inner edge of which is truncate, the surface densely ciliate ; 

 the palpi 3- jointed, the first largest, obovate, second narrower and shoi"ter, the 

 third slender, subuliform. 



Mentum trapezoidal, the sides arcuate, apex truncate, face obliquely impressed 

 each side ; the subnientum broader, of the same general form ; jjalpi similar to 

 the maxillary, but nuich swollen, the ligula concealed by them, semi-circular, 

 the palpi and ligula rather densely pilose. 



Antenna small, situated near the base of the mandibles above the oval tu- 

 bercle, 3-jointed, the first joint short, cylindrical, second narrower and longer, 

 the third small, slender and bisetose at tip. 



This larva reproduces the form and nearly all the details of Apate 



capucina as published by Ferris (Ann. Fr. 1850, pi. xvi, 1). The 



antennte are there described as 4-jointed, but the conical basal piece 



as described seems rather to be the protuberant conneetmg membrane. 



