Vol. Xxiv] ENTOMOLOGICAL NEWS. I 2J 



This area, which is not due to denudation, is somewhat vari- 

 able and in some females borders the posterior margin of the 

 head for at least a millimeter. There are many other less ob- 

 vious differences, but the above characters will be sufficient to 

 separate the two species at once. 



It may be mentioned here that, while the figure of Hncclla 

 given on Plate I, fig. 28, Synop. of the Mordellidae by John 

 B. Smith in Trans. Amer. Ent. Soc., Vol. X, 1882, is a correct 

 representation of the first specimen in the LeConte Cabinet, 

 all the 1 others in the type series, and all the specimens I have 

 seen, have the outer rows of pubescence nearly obliterated ex- 

 cept at a point slightly behind the middle, where they form a 

 quadrate spot that becomes the most distinctive feature of the 

 ornamentation. 



Through the kindness of Mr. F. W. Dodge, of Melrose, 

 Mass., I have been able to examine nearly one hundred adults 

 of T. bidentata and also the larvae and the pupae. 



The males of this species can readily be separated by the 

 more pronounced arcuation of the front tibia, the inner face 

 of which is set with erect hairs ; these become distinctly seta- 

 ceous near the apex, which is noticeably enlarged when viewed 

 from in front. The lower edge of the front femora, in the 

 males, is fringed with long cinereous hairs and the maxillary 

 palpi are also clothed with longer pubescence. All these male 

 characters, except the enlarged distal end of the front tibiae, 

 hold good in my limited series of lineella. There are other 

 slight differences in the shape of the tip of the anal style, last 

 joint of the palpi, and the joints of the antennae. 



Larval characters. One of the larvae given me shows signs of hav- 

 ing been near pupation when placed in the alcohol. The other is yel- 

 lowish white, cylindrical, slightly arcuately bent, and measures 19 milli- 

 meters from the mandibles to the tip of the anal process. The head, 

 which is narrower than and retracted into the first thoracic segment, 

 is sparsely covered with slightly darker granulations, each bearing a 

 yellowish hair. The mandibles are nearly black at the tips, becoming 

 light brown toward the bases. The front has a slight median sulcus 

 from above the clypcal area to the occiput. With my limited optical 

 instruments, the antennae appear to be four-jointed, proceeding from 

 a large fleshy tubercle; the first joint is short, slightlv smaller than the 



