270 



Th. Becker. Dipterologische Studien. 



[158] 



tliird Joint obcurdutc. Ari.sta ^^labruiis arclicd, tlic i)eiiulriiaatc jnint as lung 

 as tlie tliird of aiiteiinae, the last twico as long, slender. Palj)! hlaek. 

 Winu'S hyaline, tlic tip w itli a uarmw black edg'c, the hind iiiar^iii sinuated, 

 the subcostal areulet long-, the subapical vein sinuated, the diseal veinlet 

 stvaight. Alulae with i)ale t'nno-e. Leg.s rather sliort, testaceoiis: eoxae 

 cinereons: feniura below, the anteriur pairs (»nly at the base ciliated with 

 line pale hairs; the posterior ones above ciliated with black bristles; before 

 the ti}) in front two spines on the middle, one on tlie liiiid tliig'h. Fore 

 tarsus Short, the inetatarsus as long as the following- three jomts together; 

 middle tarsus dusky, with only the base of the nietatarsus yellowish: this 

 is spineless and shorter than the following Joint, liypopygiiun two thirds 

 of the length of the abdomen and closely apjdied to the ventral surface; 

 aculeus shorter than it. intervally bidentate, the tip produced into a straiglit 

 spiue; uext a forceps with nearly linear arnis, angulated iiear the tip; near 

 the apex another forceps, with broader somewhat curved triangulär lobes, 

 pale with dusky ti]), extending beyond the lamellae, which are blackish 

 brown, broad at the tip, obtuse and slightly ciliated. The length of the 

 subcostal areolets indicates au approach to Argyra. 



A Single specimen found among the sea-needs, on the sandhills of 

 ßossbegh Point (Kerry), in July. 



LichtAvardt fand diese Art auf der Nordsee- Insel ]^)orkum und ich 

 fing sie im Juni am ^Meeresstrande bei Arcachou, südlich von ]>ordeaux. 



■'■"^„ 



■y 



Fig. 83. 

 Muscidideicus pradextatas Ilalid. ^. 27 ; 1. 



Fig. 84. 

 Muscidideicus 2Jraetextatus Halid. r^. 13 : 1. 



