NORTH AiMERICAN COLEOPTKKA. 251 



Group XI.— ARSIPODES. 



Anteiiiue ll-jointed. Pronotuni without transverse impres^^ioii at 

 base. Anterior coxal cavities closed behind, ventral segments free. 

 Fourth joint of hind tarsus simple. Posterior tibite with a small 

 simple spur. 



By these few characters it will be seen that the group forms the 

 link between the Crepidodene on the one hand with the Cluetocnenia?. 



But one genus is known in our fauna characterized by the well 

 marked, short, longitudinal basal impression. In much of the Eu- 

 ropean literature the name Balanomorpha is used, but Mantura 

 should properly remain. 



MAI^TIJRA Steph. 



Head inserted as far as the eyes, front flat, without carina or tu- 

 bercles. Eyes rounded, entire, rather coarsely granulated. Labrum 

 narrow, slightly sinuate at nnddle. Antennse slender, half as long 

 as the body, the outer five joints abruptly slightly broader. Max- 

 illary pali)i cylindrical, last joint elongate conical, a little shorter 

 than the preceding. Thorax much broader than long, narrower in 

 front, a deep impression adjacent to the base, opposite the nn'ddle of 

 each elytron extending nearly half way to apex, no transverse im- 

 pression. Prosternum moderately separating the coxre, the cavities 

 closed behind. Middle coxjb more widely separated, the niesoster- 

 num declivous. First ventral segment nearly as long as all the 

 others. Legs rather short, tibise gradually slightly broader to tip, 

 each one with a small terminal sjjur, outer edge rounded, slightlv 

 flattened near the apex ; claws simple. 



This genus is the only representative in our fauna of the uroup 

 Arsipodites of Chapuis (Genera xi, p. 37), which is closely related to 

 the Crepidoderites differing only in the absence of the transverse 

 ante-basal impression. The longitudinal impressions are deeper than 

 in any of our Crepidoderites and are triangular in form, broadest at 

 the base of the thorax. Mantura is notable in being one of the few 

 genera of Halticides with a spur on each tibia. 



31, floridaiia Crotch. — Elongnte oval, moderately convex, brownish, sur- 

 face with faint bronze lustre, elytra indefinitely i)aler at apical third. Head 

 alutaceons, coarsely, not closely punctate, a well marked, transverse groove l)e- 

 tween the eyes. Thorax nearly twice as wide as long, widest at base, gradually 

 narrowed in front, sides feebly arcuate, apex truncate, base arcuate, a little more 

 broadly at nnddle, disc convex, coarsely, deeply and moderately closely punctate, 



