140 Journal New York Entomological Society. C^^'oi- xxviii. 



(Original description.) 



" Ovate, black ; head without indented line ; elytra without regular punc- 

 tures. Desc. Body very short, ovate, black ; head without the usual dilated 

 indentation but a very slight indentation may be observed on close inspection, 

 particularly on the lower part of the front ; slightly punctured : thorax equal 

 with the exception of a dilated indentation on each side with distant punctures 

 in which is a raised centre ; scutel large, flat, impunctured, polished ; elytra 

 with wide, irregular not deeply impressed punctures, without any appearance 

 of a regular series, no appearance of elevated lines, a profound excavation 

 behind the humerus without any sinus of the edge, humerus prominent. Length 

 rather more than one-tenth of an inch. This is the smallest species I have met 

 with and of a shorter form. 



■'Afterwards (Trans. Amer. Phil. Soc. vol. 6, p. 164) made the type of a 

 new genus Metoniits which is identical with Pachyschelus. T. ovata Weber 

 is a very different insect belonging to Brachys, — Lee. 



" .1/. ovatiis nob. (Trachys) Ann. Lye. X. Y. Those who will retain this 

 species in Trachys must change the name of Icrvigatits as the other is pre- 

 occupied in the genus." 



The pubescence of the ventral surface is less pronounced than that 

 of the preceding species. The sexual characters are similar to those 

 of purpurens except that in the males, the process on the last ventral 

 segment bears four instead of three small teeth. Length, 2-3 mm. 



This species is very common in most localities and ranges from 

 S. E. Canada to Florida and west to Iowa. Late May to August 11. 

 Blatchley records it on the foliage of black gum and flowers of black 

 haw, milkweed, etc. According to Chambers it mines Dcsmodium. 

 This species was redescribed many times. Called ovatiis by Say in 

 his original description (1825) the name was preoccupied in the genus 

 Trachys. Afterward (1836) discovering his error, the name Iccvigatns 

 was proposed and although since put in another genus, to comply with 

 the laws of nomenclature the latter name must be retained. Le Conte's 

 carbonatiis is merely a phase of this species, but just why one having 

 such a universal knowledge of the family as Kerremans should re- 

 describe it under the name politiis is hard to understand. 



Pachyschelus schwarzi Kerremans, 92-298. 

 ccrntleiis \\ Schwarz, 78-364. 



(Original description.) 



/ 



" Short ovate, black, head and thorax bluish black or black with seneous 

 tinge, scutellum and elytra bright blue, shining. Head deeply channeled, alu- 



