AMERICAN ENTOMOLOGY. 53 



DlCvELUS DILATATUS. — Specific character. Black, impuuc- 

 tured ; striae obsoletely punctured towards the tip. 



Diceelus dilatatus nobis, Trans. Anier. Philos. Soc. vol. ii. New 

 Series, p. 68. 



Dcsc. Head black : palpi blackish-piceous : antennae brown 

 towards tbe tip : thorax entirely black ; margins depressed ; late- 

 ral edge slightly reflected ; base very slightly wider than any 

 other part ; lateral edge nearly rectilinear, very slightly incurved 

 before, and not at all excurved near the posterior angles : elytra 

 totally black ; striae profound, very slightly punctured towards 

 the tip : feet piceous. 



Obs. This species is an inhabitant of Pennsylvania, and may 

 be occasionally found under stones and other objects, which rest 

 loosely on the soil. Its color is a uniform black, Avithout any 

 tint of those gay colors for which the two preceding species are 

 remarkable. 



The lower left figure. 



Dic^lus SCULPTILIS. — Specific diameter. Black; elytra 

 with irregularly serpentine striae. 



Dicxlus sculptilis nobis, Trans. Amer. Philos. Soc. vol. ii. New 

 Series, p. 68. 



Desc. Body entirely black, immaculate : thorax very slightly 

 widest at base ; the lateral edge not at all excurved near the 

 basal angle, and the commencement of the anterior curvature of 

 this edge is at the middle of its length ; elytra with their striae 

 very irregularly serpentine ; the interstitial lines are irregular 

 and unequal on their sides, and exhibit a very few adventitious 

 punctures, with raised centres. 



Obs. Very distinct from the foregoing species, by the singular 

 irregularity, and sculptured appearance, of the striae of the elytra. 

 It was discovered in Missouri by Mr. Thomas Nuttall, and has 

 not been found in the Atlantic States. 



The lower right figure. 



[Occurs in western Pennsylvania. — Leg.] 



MANTISPA. Plate XXV. 



Generic character. Antennae filiform, but little longer than 

 the head, the joints transverse ; eyes prominent ; thorax having 

 the anterior segment elongated, cylindric-clavate, supporting the 



