NORTH AMERICAN COI.EOPTERA. 305 



I have before me a specimen which I am (jiiite convinced is the male 

 of the above. It differs in having the elytra very distinctly alnta- 

 ceous so as to be subopaque with a greasy aspect, the punctuation 

 less distinct. The apices of joints 8-9-10 of the antenniTs are pro- 

 longed on their lower edge so as to be acutely serrate. In other re- 

 spects the two specimens agree, the former being the female, the latter 

 a male. Occurs with the preceding. PI. VII, fig. 19, 



.4. insolita Mels. — Oval, slijjhtly oblong, convex, rufo testaceous, shining. 

 Antennse longer than half the body, stout, the first and last two joints testaceous, 

 the others brown. Head smooth, inipunctate. Thorax one-fourth wider than 

 long, not narrowed in front, sides nearly straight, anterior angles obliquely trun- 

 cate, with distinct post-apical angulation, base feebly arcuate, disc convex, 

 smooth and polished. Elytra distinctly wider at base than the thorax, humeri 

 obtusely prominent, umbone distinct, sutural angles distinct, but obtuse, disc 

 convex, the punctuation excessively fine and visible only at base near suture, 

 where one vague stria is seen, otherwise polished. Body beneath and legs similar 

 in color to upper surface, tarsi brown. Length .07— .08 inch. ; 2 mm. 



The antennae are stouter than usual in the group Aphthona3 ; the 

 first joint is oval, suddenly narrowed at base, second oval, narrower 

 and about half as long, third more slender not longer, joints 4-10 

 gradually very little longer and broader; eleventh longer, acuminate 

 at tip. 



The occurrence of paler joints at the tip of the antennae seems to 

 be a rare character in the Halticini, but the extreme tip of the 

 eleventh joint is black, although the remainder as well as the tenth 

 is quite pale. 



This insect was originally described by Melsheimer as a doubtful 

 ^phseroderma, and later Crotch made a new genus — CerataUica, 

 and placed by him in such a position as to lead to the inference that 

 the anterior coxal cavities are closed. The fects are, however, quite 

 the reverse, and the only character of moment not possessed by the 

 other Aphthonje is found in the moderately stout antennae. 



In general appearance and color the insect resembles Lougiiarsus 

 rabklus, but the very polished surface is like the preceding species. 



Occurs in Pennsylvania (Melsheimer) and Capron, Florida 

 (Schwarz). 



The following species has not been identified : 



A. SHbg;lobosa Motsch.— Nigro-picea, subtiliter punctatissima ; elytris 

 subglobosis, antennarum basi, tibiis tarsisque rufo-piccis. Length two-thirds, 

 width three-fifths of a line. 



TRANS. AM. ENT. SOC. XVI. (39) JULY, 1889. 



