January — Fcliriiary ]S.S4.] 



rsrcHE. 



VI 



and third together as long ;is tlic first. 

 The outer distal angle of the third joint 

 is continued as a cylindrical process, 

 which reaches to the end of the joint 

 following. 



The mandibles (fig. 7C) ai'e rather 

 n:irro\v (the \vidth being about two- 

 thirds the length), strongly curved, 

 comp.-uativeh' broad, and obtuse at tip. 

 where the\' are emarginnte, or some- 

 times trifid. Each l.iears two long, slen- 

 der hairs at its outer base. 



The cardinal and basal pieces of the 

 maxilla (fig. yBc) are not clearly dis- 

 tinct: the maxillary lol)e is stout, round- 

 ed at the tip, and convex internally, 

 with about ten spines, of var^■ing 

 strength, along the inner maigin. the 

 two basal ones being very strong, and 

 about half the length of the lobe. This 

 last extends only a little beyond the 

 second joint of tlic palpus. The palpi 

 (fig. 7l^'^l' '^''^ prominent and four- 

 jointed, the third joint longest, about 

 equal to the first and second together, 

 and the fourth slender and c\ lintlrical. 



The labium (fig. 7Bb) is thick and 

 quadrate, without distinct palpigerou.s 

 tidiercle, and bears on its under surface 

 two slender, cylindrical, unarticulate 

 palpi (fig. 7Ba), which are about as 

 long as the third joint of the maxilla, 

 and taper slightlv distallw 



P?ipa. The pupa is 3.3 mm. long 

 by 2.5 mm. wide; white, except the 

 e3'es and the mandibles, which show 

 through the outer envelop red or Ijlack. 



The front of the head is set with a 

 few long, stout hairs, articulated upon 

 slender, conical tubercles: antl three 

 similar rows of hairs appear upon tiie 



thorax, one near the anterior border, 

 anothei' nenr the posterior, and a third 

 intermediate. Six other hairs occur 

 upon the scutellum. ;md a row of about 

 six or eight borders each one of the 

 abdominal segments above. 



The anterior inferior angle of the tibio- 

 femoral articulation of each leg bears a 

 stout, curved hook, that on the first pnir 

 of legs being \"ery small. Each of these 

 ;uticuIations ts likewise armed with two 

 long hairs borne upcni slender, conical 

 tubercles. The sheaths of the antennae 

 ;ire tuberculate externallv 



The posterior segments of the abdo- 

 men are peculiarly armed. The last 

 (fig. 7F) terminates in two simple, 

 incurved hooks, and bears in tront ot 

 these a pair of stout lateral spines, 

 projecting directly outwards: while a 

 similar but smaller pair of backward- 

 projecting spines is borne by the penul- 

 timate. 



J Jfe- History. 



The imago is said by Dr. Fitch to 

 iqjpear in the latter jjart of June, con- 

 tinuing through the month of July. Mr. 

 Riley, in his third Missouri report, says 

 that pupation commences in Ju'ne, the 

 lieetles appearing in that month and con- 

 tinuing to issue from the grountl until fall 



Larvae of this species were first seen 

 bv me in southern Illinois on 19 May, at 

 which time tliey were about half-grown. 

 On 28 June, full-grown larvae and im:i- 

 gos were found in the eartli, in straw- 

 berrv fields, the imagos having, of 

 course, just transformed. Adults again 

 occurred in the earth on y J^dy. but by 

 i.S Julv all had emerged. As early as 



