2 20 The Species of Amblychila. [zoe 



considering the Dupont specimens as those of the Texan form of 

 cylindriformis. But what are we to do with the great bulk of 

 the description by Reiche, which does not fit cylindriformis Say; 

 and what with the figure in Thomson, which is a good portrait 

 of my recent addition from Arizona ? In the description of 

 A. Baroni a glaring mistake was made in sex, calling the 

 example a female when it should have been recorded as a male, 

 as a subsequent examination proved it to be. 



Say's description may be taken as fairly good. His appli- 

 cation of the name is also good, as it would be applicable. The 

 form is subcylindric or subquadrate, but neither of these terms 

 would be appropriate to either of the other species or forms, 

 because they are wider than deep, and altogether flatter insects. 



Description: P'orm gracefully elongate-oval. Above wholly 

 shining black with high polish. Beneath also shining black. 

 Head subquadrate; clypeus with the usual marginal punctures; 

 behind the clypeal suture are two punctures widely separated; 

 behind the second or frontal suture are two punctures as in 

 A. Baroni but there are about ten or twelve other punctures 

 difiering both in number and position from those seen in Baro?ii. 

 Thorax strongly convex; longer than wide as observed from 

 above; broad across the front and produced in the middle; much 

 narrowed behind; from the front angles runs a well defined 

 raised continuous marginal line which extends along the lateral 

 and basal margins; an uneven longitudinal central impressed 

 line begins infirml}^ on the basal margin and ceases about 

 where the arcuate impressed line crosses the fore part of the disc. 

 Elytra twice as long as wide; much flattened on the central 

 area; two-thirds from sutural line arises a well-defined carina, it 

 is high and sharp, beginning at the base and ending abruptly 

 one-fourth from the apex. A raised line just as bold as the 

 carina runs nearly parallel to it, but beginning a little short of 

 the base and ending firmly and nearer the apex than does the 

 carina, this line is punctured at wide intervals and becomes 

 slightly serrate at the base. Another raised line, which might 

 be termed the acute margin, begins on the basal angle but does 

 not reach so near to the apex as the other line or the carina; 

 this line is strongly mucronate and at the basal angle it becomes 



