lunu'.irv — Febmarv 1SS4.] 



PSYCHE. 



127 



the others. The hairs of the medinn 

 portion of the ridge are separated into 

 two groups bv a narrow, median, nalied 

 strip. The vent is surrounded hy a cir- 

 clet of ten short hairs. All the hairs of 

 the last four segments are longer and 

 stouter than those preceding ; and those 

 of the dorsal surfaces of these segments 

 are likewise more nmiierous. The dor- 

 sal arches of the last two abdominal 

 rings are broken into four prominent 

 tubercles, which are sometimes slightK' 

 blackened, and bear especially strong 

 spinous hairs. 



The eyes are represented by a small 

 cluster of a varying number of pigment 

 specks, situated at less than the length 

 of the antenna above its base. 



The antennae are three- jointed, verv 

 short, not twice as long as wide, the 

 length of the basal joint being just about 

 its width. The cylindrical process of 

 the penultimate joint is segmented off, 

 forming an apparent accessory article 

 beside the terminal one. The clv- 

 peus is about as long as the labrum ; 

 and upon the middle of the upper sm- 

 face of tlie latter are four long hairs, 

 arranged transversely ; and at the infe- 

 rior edge of the posterior surface are 

 eight strong hooks or spines, pro- 

 jecting inwards and backwards. The 

 maxillary palpi are strong and thick, 

 the two basal joints being broader than 

 long, the third about as long as wide, 

 and the fourth ovate. The tip of the 

 third joint extends scarcely bevond the 

 c-nd of the blade of the maxilla. The 

 latter is not longer than broad, and "is 

 armed with about ten stout, blunt spines 

 :it its inner margin. 



The general form of the mandibles 

 (tig. 6B), seen from above, is triangu- 

 lar, the length licing scarcely greater 

 than tlie width at their base. The tip, 

 seen from beneath, is obtuse and more 

 or less conspicuously emarginate, often 

 decidedly lobed, in which case the lobes 

 are equal. It is never tritid, and never 

 acute. Occasionally this bilobate char- 

 acter of tiie mandibles is indicated bv a 

 longitudinal gioove, which scarcely ren- 

 ders the tip emarginate. 



The anal segment of this lar\ a is used 

 as a proleg, the grub looping along on a 

 smooth surface after the mannei' (jf a 

 phalacnid larva. 



Pupa. The pupa may be distin- 

 guished b> did'crences in the armature 

 of the posterior segments of the abdo- 

 men, especially the last (fig. 6A). This 

 terminates in a pair of brown, chitinous 

 hooks, which cLU've ilorsally, instead of 

 inwards as in Colaspis^ each being fur- 

 nisliei! \\ith a strong, erect tooth or 

 spine arising from the upper side oi the 

 l)ase. From the middle of the concave 

 margin of each hook springs a long- 

 slender hair. The spines in front of 

 these anal hooks project directly back- 

 wards. This pupa is further distin- 

 guished from that of Colaspis by the 

 absence of spines upon the anterior infe- 

 rior angle of the tibio-femoral articula- 

 tion of the first and second pairs of legs. 



T^ife-Hi.'itorv. 



Last April the adult beetles were 

 found not uncommonly in strawberry 

 tields in southern Illinois, having evi- 

 denth lately emerged from their winter 



