112 MTCETOPHILID^E. 



Genus EXECHIA, Winn. 



Exechia, Winnertz, Verb, zool.-bot. Ges. Wien, xiii, p. 879 (1863). 

 Parexechia, Becker, Insekten von Jan May en, p. 62 (1886). 

 Brachydicrania, Skuse, Proc. Linn. Soc. N. S. Wales (2) iii, p 1215 

 ' (1888). 



GENOTYPE, Tipulafungorum, de Geer ; designated by Johannsen.* 



Head roundish, compressed in the front part, situated deep in 

 the thorax ; front broad. Eyes longish-round ; lateral ocelli large, 

 closely contiguous to the eye-margins, middle ocellus either very 

 small, placed in a groove on the front, or entirely wanting. 

 Palpi incurved, four-jointed, 1st joint small, 4th longest. Antennae 

 projecting forward, somewhat arcuated, 16-jointed, 1st joint of 

 the scape cyathiform, 2nd much shorter than the 1st, cupuliform, 

 both setiferous at the tip ; flagellar joints cylindrical, somewhat 

 compressed, with minute downy pubescence. Thorax ovate* 

 highly arched, with a short pubescence, setose on the lateral and 

 hind borders ; scutellum semicircular, setose, metanotum steep. 

 Abdomen slender, in the male with six, in the female with seven 

 segments, narrowed at the base, cylindrical or a little compressed ; 

 anal joint of the male rather large, forceps moderate or small ; 

 ovipositor of the female very short, with two small lamellae. 

 Legs long, slender, intermediate and hind femora rather broadly 

 compressed, tibiae spurred, and with lateral spines, fore pair with 

 one distinct range of very minute spines on the inner side, and 

 a few small spines along the outer side, intermediate pair with 

 a range of small spines on each side, hind pair with two ranges of 

 rather longer spines on the extensor surface ; plantae of meta- 

 tarsus of hind tarsus with minute setulse. Wings shorter than r 

 subequal to, or a little longer than the abdomen, oblong oval, with 

 rounded base, and with microscopic setulse arranged in longi- 

 tudinal rows. Costal vein ending at tip of 3rd vein, some 

 distance before the wing-tip ; auxiliary vein very short, complete 

 or incomplete, turning down towards the 1st longitudinal ; 3rd 

 vein beginning before middle of wing, angled at base, thence 

 straight ; anterior cross-vein moderately long, oblique, 4th longi- 

 tudinal forked very soon after contact with cross-vein, before 

 middle of wing, the branches approximately parallel ; 5th longi- 

 tudinal forked about its middle, approximately under fork of 4th,. 

 the branches distinctly diverging ; 6th and 7th veins distinct but 

 short. 



Range. Europe, Greenland, and Eastern Himalayas. 



Life-history. Apparently nothing known beyond that the larvae 

 live in fungi, and that the perfect insects appear in woods and 

 bushes in the spring. One species is said to do considerable 

 damage in Europe to mushrooms. 



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



