EXECHIA. MTCETOPHILA. 113 



" Brachydicrania and Parexechia do not differ from Exechia 

 except that they possess but two ocelli while Exechia has three, 

 the middle one being very minute. The forms with two ocelli 

 should not be confused with Mycetophila which has very stout 

 tibial lateral setae, and larvae with ambulacral setulae. The larvae 

 of Exechia are commonly present in many species of fungi. They 

 do not have the transverse rows of ambulacral setulae " *. 



66. Exechia basilinea, sp. nov. (PI. II, fig. 12.) 



(5 $ . Head wholly yellow, apical third or half of flagellum 

 blackish ; frons and vertex with fine golden yellow hairs, a trans- 

 verse row of short black bristles above the antennae. In the female 

 the frons and vertex, also the flagellum except at base, are blackish. 

 Thorax reddish yellow, paler at sides. A row of stiff bristles of 

 various sizes along anterior margin ; several others on and below 

 shdulders, two strong ones on each humerus, lateral ones towards 

 the sides, a strong one on each posterior corner, and irregularly 

 placed small ones on the dorsum ; these latter conspicuous coin- 

 pared with the very minute yellow pubescence. Scutellum with 

 an apical pair of curved bristles, crossing one another, with 

 a similar, much smaller pair in front of them. Metapleura with 

 stiff hairs. Abdomen reddish yellow, compressed, with short 

 yellowish hairs ; segments with a black basal band, which narrows 

 towards the sides, but in its middle reaches the base of the 

 following segment. Hind margin of 1st segment with a narrow, 

 well defined, yellowish white band ; belly pale. Genitalia of male 

 consisting of a pair of large, at least two-jointed, claspers, with 

 some narrow horny hook-like intermediate organs ; a pair of 

 small narrow bright lemon-yellow palp-like appendages appear to 

 take the place of the dorsal plate, which is absent. In the female 

 there is a pair of pad-like hairy plates and a long conical internal 

 organ with an ovipositor. Legs : coxae reddish yellow, femora 

 pale yellow, tibiae pale blackish yellow, tarsi blackish. Wings and 

 halteres pale yellow. 



Length 4| millim. 



Described from a single male and female in the Indian 

 Museum, taken at Kurseong, Darjiliug district, 3 and 4. vii. 08 

 (Dr. Annandale). 



Genus MYCETOPHILA, Mg. 



Mycetophila, Meigen, 11%. Mag. ii, p. 263 (1803). 

 Mycetina, Rondani, Dipt. Ital. Prod, i, p. 195 (1856). 

 Mycozetcea, Rondani, loc. cit. iv, Corrigenda, p. 12 (1861). 

 Fungivora, Meigen, Nouv. class, mouches (1800), nom. mid. 



GENOTYPE : Johannsen has set up M. agarici, Oliv., as the 

 type-species. 



* Johannsen, Gen. Ins., Fasc. 93, p. 106 (1909). 



