212 GEO. H. HORN, M. I). 



From all the preceding species tneUieoUis may be known by the 

 entirely vellow femora. From polifula, which has a similarly colored 

 head and abdomen, it may, in addition, l)e known by the almost 

 entire absence of punctuation on the elytra. From xaufhomeheiia 

 and cervicalis the color of the head, abdomen and legs will sej^arate it. 



Occurs in Louisiana, Texas and Colorado. 



18. D. collata Fab. — Oval, slightly oblong, subdepressed. Aiiteiiiife half 

 as long as the body, piceous, the three basal joints pale beneath. Vertex and 

 occiput black, with faint greenish tinge, front yellow, labrum piceous, a few very 

 coarse punctures close to the eye, others finer, scattered on the vertex. Thorax 

 yellow, immaculate, twice as wide as long, narrowed in front, sides feebly arcu- 

 ate, margin narrow, surface polished, and, with high power, minutely sparsely 

 jiunctulate. Elytra not wider at base than the thorax, humeri rounded, umbone 

 not distinct, greenish blue, shining, when seen with high power niiiiutely aluta- 

 ceous, and with fine, distinct, sparsely placed punctures. Prothorax beneath 

 yellow, nietasternum black, abdomen piceous with the last segment and sides 

 broadly yellowish, the surface moderately densely jmnctured and with quite 

 distinct pubescence. Femora pale yellow, tibia? at tips and tarsi piceous. Length 

 .16 — .18 inch.; 4 — 4..5 mm. 



This is the smallest species at present known in our fauna. The 

 same remai-ks as under mellicoUis will separate this species from all 

 which ))recede. It is not so easily separated from that species, how- 

 ever, by description. It is smaller, more elongate, the elytra are 

 shining blue-green jind the punctuation, although very fine, more 

 distinct. This species is, I believe, correctly determined in most 

 cabinets. 



Occurs in Georgia and Florida. 



HE.HIPHKYXl S n. g. 



Head oval, in.serted as far as the eyes, front nearly vertical, carina 

 and tubercles distinct, clyj^eus truncate, labrum transverse, arcuate 

 in front. jNIaxillary palpi not stout, second joint slightly clavate, 

 thiid as long, obconical, fourth shorter, narrower, conical and acute 

 at tip. Mandibles tridentate at apex, the middle tooth longer. Eyes 

 oval, moderately prominent. Antennie longer than half the body, 

 filiform, first joint slightly clavate, .-second nearly half as long, third 

 longer than second, fourth and fifth still longer, joints 6-10 gradually 

 shorter, eleventh as long as fourth. Prothorax transverse, narrowed 

 in front, apex truncate, base broadly arcuate; disc convex, with a 

 vague depression each side close to basal margin. Elytra a little 

 wider at base than the thorax, oblong oval, widest at middle, disc 



