THE CANADIAN ENTOMOLOGIST. 253 



STUDIES IN THE CARABOIDEA AND LAMELLICORNIA. 



BY THOS. L. CASEY, WASHINGTON, D. C. 



The following studies have been in view on the part of the writer for 

 some time, but no good opportunity to complete them offered itself until 

 very lately, when Mr. Fuchs sent me a good assortment of the various 

 forms of Omus from his collection. This material, together with my own, 

 gives me a tolerably full and representative series from various localities 

 upon which to base a new tabular statement, although, unfortunately, 

 some of the described species are still unknown to me. Some isolated 

 studies in Cicindela and a few Carabids and Lamellicorns, believed to be 

 new, are made known in addition. 



CICINDELID.E. 



Amblychila, Say. 

 The difference between the cylindriformis and Baroni types in this 

 genus are almost subgeneric in nature. The following is apparently a 

 subspecies of Baroni : 



A. longipes, n. subsp. — Form elongate, flattened above, but feebly 

 ventricose, deep black throughout, densely alutaceous or subopaque above, 

 feebly so and more shining beneath ; head nearly as in Baroni, the 

 antennae very long, three-fourths as long as the body ; labrum bluntly and 

 approximately bidentate medially ; prothorax evidently wider than the 

 head, as long as wide, obtrapezoidal, with feebly arcuate sides, more 

 rounded anteriorly, the apex broadly, evenly and feebly arcuate ; surface 

 evenly convex, the median line finely striiform ; elytra fully three fourths 

 longer than wide, barely a fourth wider than the prothorax, with fine 

 scattered asperate punctures, serially arranged, the lateral carina fine and 

 rather broken, extending nearly to apical third, with a similar carina 

 parallel and a short distance above it, extending about as far posteriory, 

 also a few elongate carinules, forming a third short subbasal and discon- 

 nected line; legs long and slender, the hind tibia and tarsus subequal and 

 together fully three-fourths as long as the body. Length (J ), 21.7 mm.; 

 width, 7.3 mm. Arizona (Baboquivari Mts.), F. H. Snow. 



Differs from Baroni, as evident from the photograph of the type 

 published by Mr. Rivers (Zoe IV, 1893, p. 218), in its less inflated, more 

 elongate and less shouldered hind body, with relatively smaller punctures 

 and a well-developed second pleural carina at a short distance above the 

 first, in the larger prothorax, with less arcuate anterior margin, and in its 



August, 1909 



