^ ')• *>-i] DIPTERA OF COXXECTICUT : TAXONOMY BO.') 



The adult flies are most often found by sweepinjtr veo;etation in 

 shaded moist ])laces. L. suhcostata frecjuents oj)en gorges and cold 

 boggy Avoods; luteola^ novae-angliae, plaft/j/haUus and terrae-novae in 

 and near margins of cold bogs. The other species occur along streams 

 and in open woodlands. The early stages, as known, are si)ent in rich 

 organic mud. 



Key to Species 

 (Based chiefly on male characters) 



1. General coloration of thorax light gray; wings unmarked, .-xcept for the 



stigma when this is evident 2 



General coloration shiny reddish or yellowish to dark brown; if at all 

 pruinose. the wings are suffused with darker, at least on the costal and 

 apical portions 3 



2. Wings with Rs short, angulated and often spurred at origin ; Rs without 



macrotrichia ; femora chiefly brownish black, their bases narrowly yellow- 

 ish, this including less than the proximal half subcostata 



Wings with Rs unusually long for a member of this subgenus, about equal 

 in length to the anterior branch of Rs, arcuated at origin ; Rs with 

 macrotrichia for almost the entire length ; femora chiefly obscure yellow, 

 the tips narrowly darkened fratria 



3. Wings unmarked, except for the slightly darker stigmal area 4 



Wings more or less patterned with darker, at least the outer radial ceils 



clouded 6 



4. Abdomen ( d ) uniformly brownish yellow, without a distinct dark subtcr- 



minal ring; antennae ($) brownish yellow, short, if bent backward not 

 extending to the wing-root; male hypopygium (Fig. 46, E) with the gona- 

 pophyses appearing as three short, dagger-like, blackened points, surround- 

 ed at base by scale-like spinulae, the median point smallest lutea 



Abdomen (S) brownish yellow, with a blackened subterminal ring; antennae 

 ( $) dark brown, elongate, if bent backward extending' approximately to 

 root of halteres : male hypopygium (Fig. 46, G, J) without dagger-like, 

 blackened gonapophyses 5 



5. Male hypopygium (Fig. 46. J) witii the aedeagus greatly compressed, pod- 



siiaped or reniform in outline siouana 



Male hypopygium (Fig. 46, G) with the aedeagiis only slightly compressed 



novaeangliae 



6. Wings with the disk clear, the costal region and apex strongly suffused 



with brown, the cord not or scarcely marked with darker; mcsonotum 

 dark brown: male hypopygium (as known) with the aedeagus greatly 



compressed, pod-shaped in outline (Fig. 46, H) ■ • ■ • 7 



Wings without such a combination of infumed costal and apical regions, 

 in conjunction with an unseamed cord (compare fuinicijcosta) ; mcsono- 

 tum shiny reddish or ferruginous, rarely dark brown (siniilis, ncadusta) : 

 male hvpopvgium with the aedeagus cylindrical or nearly so (Fig. 46. 

 A, B, C) ." • ^ 



7. Rs almost without macrotrichia. only with two or three at near midlength 



terrae novae 



i?s- with from ten to fifteen macrotrichia, distributed for almost the ••ntire 

 I J platyphallus 



8. Femo5-a\miformly yellow ".'.'.'.".'.".'.'.'.'..'.'. .'.'.' auripennis 



Femora more or less extensively "dark brown at tips • ■ ^ 



9. Winffs with an apical darkening but with no seams along the cord or veni 



Ciii; femora chiefly blackened, with more than the distal hall dark (ex- 

 cept in niqrogeniculata). (coiisiiiiilis subgroup) J, ' ' ' a ■ 



Wings with a narrow but distinct brown clouding along the cord and vem 

 Cii,, in addition to the apical darkening; femora chiefly yellow, only tlie 



narrow^ tips dark brown to black, (similis subgroup) • • ■ !"* 



10. Femora yellow, the tips narrowly and conspicuously blackened mgrogenicuiata 



Femora "especially of fore legs, black, only the bases restnctedly bnghtentd i i 



