3G8 An7ials Entomological Society of America [Vol. X, 



intervals of time; in the genus Hister the interval varies from 

 three to eight days, in Saprinus it is less, usually about one day. 

 I append figures of 'the ovaries of Hister obtiisatus Harris, 

 Saprinus pennsylvanicus Payk. (PI. XXX, Figs. 4-5), which 

 show the periodic ripening of the eggs. The early stages of 

 the larva are not known, but the last stage of Hololepta aequalis 

 Say may be briefly described as follows : 



Hololepta sequalis Say. Plate XXVIII, XXIX. 



Larva. Wickham. American Naturalist, XXVIII, p. 816, 

 1894. 



Length 14-16 mm. Flattened, white. 



Head strongly chitinized, quadrate, chestnut brown. Dor- 

 sally, with a shallow transverse impression about one-third 

 from the anterior margin to the posterior border, two punctures 

 on this impression, behind them and out side of them two more, 

 and behind these two and inside of them two more, a line 

 connecting all these punctures would form an almost regular 

 octagon; behind each antenna and forming the arc of a circle 

 with the center towards the antennae, three punctures. Clypeus 

 quadrate, broader than long. Antennae inserted posterior to 

 the mandibles at the anterior corners of the head,* first external 

 segment long, cylindrical, second a little more than half the 

 length of the first, dilated at apex; third short, half the length 

 of the second, narrowly cylindrical, the whole antenna almost 

 as long as the head. Mandibles stout, curved, with a stout 

 tooth a little more than halfway from the apex, on the inner 

 margin; when closed the left mandible overlaps the right. 

 Ventrally, the head has behind the labium a cordate shaped 

 impression, at the anterior margin of which there is a boss, 

 another boss occurs near the base, and connected to this impres- 

 sion at the base there is a deep spear-shaped puncture ; near the 

 lateral borders on a line with this puncture there is on each side 

 a shallow puncture. Maxillae inserted at the base of the mandible 

 near the interior border, the dorsal surface of the first visible 

 segment concave longitudinally; inner margin of the same 

 segment fringed densely, outer margin lightly fringed and with 

 a single long bristle on the apical fourth, second segment the 



*Dissection shows the antenna to be inserted on a process next to the superior 

 external basal corner of the mandibles, the true first joint. The antenna has four 

 true joints. 



