112 GEO. H. HORN, M. D. 



Specimens are kuown to me from North Carolina, Georgia, Texas, 

 Kansas and Arizona. 



Jj. atriceps u. sp. — Form oval, body beneath, head, legs and antennae 

 black ; thorax, elytra and abdomen dull yellow, subopaque. Antenna; two-thirds 

 the length of body, second and third joints small, nearly equal, together a little 

 longer than the fourth. Head alutaceous, opaque, the transverse inii)ressiou 

 straight, a short, median, impressed line. Thorax more than a half wider than 

 long, slightly narrowed in front, sides feebly arcuate, hind angles obtuse, disc 

 evenly convex, surface alutaceous, moderately closely punctulate ; srntellum 

 piceous. Elytra one-half longer than wide, sides arcuate, surface moderately 

 closely punctulate. Length .18 inch. ; 4.5 mm. 



The specimen before me is a female with the usual oval last ven- 

 tral segment. 



The first joint of the hind tarsus is more than a third the length 

 of the tibia and slightly longer than the next three joints together. 



This species resembles some of the forms of varicoruis, but diflfers 

 in its coloration and more punctate surface. 



One specimen ; Arizona, without more definite indication of lo- 

 cality, from Mr. Aug. Merkel. 



L. thoracicus Mels., Proc. Acad, iii, p. 162; Lee, Proc. Acad. 1865, p. 209. 

 — Oval, slightly oblong, black; thorax and legs, in great part, yellow. Antennse 

 two-thirds the length of the body, entirely black, third joint slightly longer 

 than second, these two together a little longer than the fourth. Head smooth, 

 the transverse impression straight, not reaching the eyes. Thorax nearly twice 

 as wide as long, not narrowed in front, sides feebly arcuate, hind angles not 

 prominent, disc moderately convex, sparsely obsoletely punctate. Elytra nearly 

 twice as long as wide, sides feebly arcuate, surface smooth, sparsely obsoletely 

 punctate, but less at sides and apex. Body beneath, except pro- and mesothorax, 

 black. Legs yellow, tarsi fuscous. Length .18 — .20 inch.; 4.5 — 5 mm. 



Male. — First joint of anterior and middle tarsi distinctly dilated. Last ven- 

 tral segment truncate at middle, with a linear incisure eash side extending half 

 the length of the segment. 



Female. — Last ventral oval at tip. 



The first joint of the hind tarsus is less than half the length of 

 the tibia, and equal to all the following joints together. 



The ventral sexual characters of this species are very like those 

 of varicoruis, but the latter has not dilated tarsi. 



This species is widely distributed, but does not seem common. It 

 is known from Pennsylvania, Maryland, Georgia and Kansas. 



L.. luteicolli!^ Lee. Trans, Am. Ent. Soc. ii, 1868, p, 57.— Oval, slightly 

 oblong,'; body beneath, head and legs, black; thorax yellow, elytra dull blue. 

 Antennae black, two-thirds the length of body, third joint a little longer than 

 the second, the two equal to the fourth. Head sparsely punctate and alutaceous, 

 the transverse impression straight and entire. Thorax nearly twice as wide as 



