VOL, Iv. ] The Species of Amblychila. 221 
strongly serrate. The céntral area forming the disc inside the: 
carine has at the base on each side of the suture four broken 
rows of muricate punctures, which are reduced to two rows at 
the middle, then reduced to one row and entirely obsolete before 
reaching the apex. In the space between the carina and the 
first raised line are alternate rows of muricate punctures, 
beginning at the base with two and increasing to four rows 
apically, but all becoming obsolete on the apex. Between the 
first and second line, the space is occupied by two or three rows 
of muricate punctures; between the second line and the real 
margin are from two to four rows of the same kind of punctures 
as before mentioned, but on the epipleural portion near the apex 
are some minute punctures without points, spines, or mucrons or 
bristles, but all the other punctures carry a bristle or stiff hair. 
The reasons for considering this species PicolominiZ Reiche 
are numerous. It agrees in the main with the descriptions by 
Reiche and Thomson and also with the latter’s figure though by 
some oversight he calls it cylindriformis Say, while it is 
a good portrait of the insect described above. Reiche says: 
‘*The only specimen I ever saw was a female.” Now what 
has become of that insect or where is the specimen that furnished 
Thomson with his figure? The reasons for considering Baroni 
as the male of Picolominii are: It is of the same color, has the 
same kind of puncturing, and is wanting only in carina and 
complete raised lines; these, however, can be traced by close 
analysis. At the base of the elytra in Bavoni the beginnings of 
raised lines are visible and the method of their formation is 
plainly discernible. The spines on the front margin of the 
punctures being depressed and fused into a continuous line by 
contact with their nearest neighbors, the keel formation begins. 
This is easily traced in Baron but it being the male form there 
is not the same necessity for keels and carinz as there is in the 
female, of which sex Picolominii seems to be. Cylindriformis 
Say has little relation as a species to Baroni or Picolominii; the 
coloring and the style of ornamentation differ. In the former 
species the elytra are usually brownish, but in the latter black 
is the color. In the former two kinds of punctural markings are 
always present while in the latter there is but one uniform style. 
