84 ACADEMY OF NATURAL SCIENCES 



thighs beyond the middle, and near the tip annulate with black, 

 tibia black, somewhat pale towards the tip, tarsi black, of the in- 

 termediate ones pale on the terminal joint, of the posterior ones, 

 basal joint pure white ; abdomen deep black, polished, venter pale 

 beneath on the middle segments. 



Length of the body three-tenths, of the posterior feet less than 

 three-fifths of an inch. 



The anterior pair offset, when compared with the others, arc 

 very short, and being extended befoi'c the head, considerably ele- 

 vated above the plane on which the insect moves, and also being 

 constantly vibrated, they assume the appearance of antennae. The 

 Vfhiteness of the anterior tarsi is very distinct and characteristic. 



This species occurred in the State of Illinois, it is also found 

 in Philadelphia. 



2. C. PALLIPES. — Black ; mouth, antennae and feet yellowish- 

 white. [98] 



Inhabits Missouri. 



Body black, elongated, slender j front, antennee and mouth 

 yellowish-white ; vertex velvet black, opaque, margined each side 

 by a silvery line : thorax with a whitish line each side before the 

 wings : nervures p^le ; feet including the coxte yellowish-white. 



Length to the tip of the abdomen, more than one-fourth of an 

 inch. 



A much smaller species than the preceding. 



[This species is a Micropcza Meig. — Sacken.] 



LOXOCERA Latr. 



L. CYLINDRICA. — Yellowish-rufous ; feet paler. 



Inhabits Pennsylvania. 



Body yellowish-rufous ; head obsoletely varied with dusky be- 

 hind the vertex; antennae fuscous, pale at base, beneath the head 

 whitish 5 thorax with an undulated band on the anterior margin, 

 dorsal line and an obsolete line before the wing, black ; wings a 

 little dusky, particularly at tip ; feet whitish; abdomen immac- 

 ulate. 



Length less than three-tenths of an inch. 



Var. a. Lineations of the thorax obsolete or wanting. 



About the size of X. ichnciimonca Fab., but it differs from that 



aiscct in manY characters. 



[Vol. III. 



