MINUTE HYMENOPTEROUS INSECTS. 589 



as a synonym the name of Microma, printed without description in Curtis's ' Guide '). 

 The type of this genus, C. latipennis, had heen reared from subcutaneous larva? in the 

 leaves of Aquilegia by Curtis, and is described as having " alae hyalinae radice obscuriores." 

 To the description is appended an editorial note that the insect is probably identical with 

 my Trichogramma evanescens ; and in the ' Monographia Chalciditum,' 1839, p. 13, the 

 last-named species reappears as belonging to my genus Pteroptrix, placed in a distinct 

 section (1), erroneously described as having 4-jointed tarsi (which is the distinguishing 

 character of Pteroptrix), with Calleptiles latipennis, Haliday, given as a synonym. In 

 the ' Entomologist,' 1840-1812, the insect again reappears, in the descriptions of Mr. 

 Haliday's beautiful series of plates of Chalcididae, under the name of Trichogramma 

 evanescens mas ; but the figure of the insect (Entomol. Mag. pi. K. figs. 4, 4a-4d) differs 

 in several important respects from my insect and its details, and evidently represents 

 not only another species with a dark band across the fore wings, but probably a male 

 insect, whilst mine was most probably a female. In Mr. Haliday's figures the number 

 of lines in which the hairs of the fore wings are arranged is considerably greater than in 

 my insect; and the antennae are evidently 7-jointed, and strongly setose, the first joint 

 of moderate size, the second about the length of the former and much thicker ; the 

 third resembles the second, as does also the fourth, which, however, is larger than the 

 third, whilst the fifth, sixth, and seventh are evidently coalesced, together forming a 

 3-jointed oval mass. 



A species of this group is described by Eoerster in the ' Verhandlungen ' of the 

 Rhiueland Natural-East. Soc. vol. viii. p. 26, pi. 1. fig. 9, a, b, c, under the name of 

 Trichogramma Walheri, which has the antennae 4-jointed or (if the last joint consists, as 

 the author supposes possible, of three joints soldered together) 6-jointed — the 1st of 

 moderate size, the 2nd and 3rd equal, subovate, and nearly as large as the basal joint, 

 and the terminal part of the antennae forming an elongated oval mass, the whole 

 antennas being very slightly setose. In his ' Hymenopt. Studien,' Heft 2, p. 89, Eoerster 

 incorrectly alludes to this insect as having been described by him (loc. cit. supra) under 

 the name of Calleptiles Walheri, and proposes, on account of the great length of the 

 ovipositor of the female, to form it into a separate genus Centrobia. 



In Eoerster's figures of the antennae of Poropoea, those of the male are represented as 

 7-jointed, the first of moderate size, the 2nd small ovate, and the five following equal- 

 sized, twice as large as the 2nd, and shortly ovate. The female antennae are also 7-jointed, 

 the 3rd and 4th joints thicker than in the male, and the last three joints clearly uniting 

 to form a terminal oval mass. In Uatzeburg's second species, Ophioneurus signatus, the 

 basal joint of the antennas is of moderate size, the 2nd as thick and nearly as large as 

 the first, the remainder (7 joints as figured) forming a large oval mass. 



In the ' Annals of Natural History,' 2nd ser. vol. vii. pp. 211-213, Mr. Walker pub- 

 lished, from Mr. Haliday's MSS., descriptions of several of these very minute insects 

 found in Ireland— namely, Myina annulipes and livens, Chcetostricha (n. g.) dimidiata, 

 Trichogramma vitripennis, and Oligosita (n. g.) collina — accompanied by the following 

 note, also by Haliday. 



SECOND SBKIES. ZOOLOGY, VOL. I. 4 I 



