• Report of the State Entomologist 243 



It Proves to be an Undescribed Species. 

 The examples from Mr. Jack were submitted by Baron Osten Sacken 

 to Mr. Kowarz,* who returned answer that they are most closely allied 

 to Phytomyza affinis Fallen (non Meig. or Macq.), and must be consid- 

 ered as a new species. In compliance with requests made, Mr. Kowarz 

 prepared a description of the fly, of which Baron Osten Sacken has 

 made the following translation, and kindly sent copies of it to Mr. 

 Jack and myself. With Mr. Jack's permission, it is herewith given :f 



Its Description as Phytomyza Chrysanthemi. 



Phytomyza Chrysanthemi n. sp. Ph. affinis Fall, simillima, setulis 

 acrostichalibus in dorso thoracis vix ullis § 9' ®^ terebra distincte 

 breviore ( 9 ) di versa. Fronte et epistomate fiavis, an tennis totis nigris, 

 thorace cum scutello cinereis, aut unicoloribus, aut lineola pallida ante 

 alas in thoracis lateribus parum perspicua, pedibus nigris, geniculis 

 tantum pallidis, abdomine nigro, margine postico segmentorum 

 anteriorum angustissime, segmenti ultimi latiore flavo. — Long. corp. 

 2 mm. 



This species is strikingly like P. affinis Fall., and differs from it only 

 in the absence of the acrostichal bristlets (at least on the front part 

 of the thoracic dorsum), and in the shorter ovipositor. 



Front and face yellow, occiput gray, antennae altogether black, 

 suctorial flaps of the proboscis yellow, tip of the palpi generally dark, 

 oral bristles distinct, gense narrow, hardly equal to one-third of the 

 height of the eye. Thorax and seutellum uniformly gray, sometimes 

 the former with a pale-yellow lateral stripe in front of the root of the 

 wings; thoracic dorsum usually with four pairs of dorsal macrochetse, 

 but without the intermediate acrostichal bristlets; J seldom a few in 

 the vicinity of the seutellum; seutellum with four macrochetse on the 

 edge. Wings almost hyaline; veins blackish, yellowish near the root; 

 the costal vein reaches the tip of the third vein only, which tip is 

 ^-ather far distant from the tip of the wing; the first, second, and third 

 veins are distinct, the other longitudinal veins are thin, especially the 

 fourth, which ends in the tip of the wing; the sixth vein is incom- 

 plete; the posterior crossvein is wanting; tegulse and halteres pale 

 yellow. Legs black, only the knees pale-yellow; sometimes also the 

 trochanters of the forelegs yellow. Abdomen black, but little shin- 

 ing, the ventral sides more or less distinctly pale-yellow; the posterior 

 edge of the anterior segments with an exceedingly narrow pale-yellow 

 margin; on the last segment this margin is more distinct. Genitals 

 black, those of the male of moderate size ; the ovipositor of the female 

 hardly as long as the last abdominal segment. Twenty specimens. 



* " Mr. Ferdinand Kowarz, in Franzensbad, Bohemia, I consider as the entomologist 

 who, at present, possesses the most extensive knowledge and experience of European 

 Diptera, especially so far as the discrimination of species is concerned."— (Baron Osten 

 Sacken, in Insect Life, ii, 1889, p. 191.) 



t Mr. Kowarz in referring, m lit, to his observations on this insect, asks that reference 

 may be made to the descriptions of Phytomyza diminuta Wlk. and P. solita Wlk., in the 

 Transactions of the [London] Entomological Society, New Series, iv, p, 232, v, p. 232. 



t [May also be called: the inner row of the dorso-central bristles,— 0. S.] 



