68 MAINE AGRICUI^TURAL ICXPERIMENT vSTATION. I912. 



2. Bxcchia umbratica Aldrich. 

 Annual Rept. Dept. Geol. Ind. XXI. i86. 1896. (Mycetophila). 



Female. Length 5.2 mm; wing 4.5 mm Thorax 



clay yellow, somewhat pruinose with white, dorsum somewhat 

 infuscated and provided with numerous stout black hairs along 

 the sides ; scutellum and metanotum also brownish. Abdomen 

 brown, compressed, the distal part of each segment with a 

 lighter ring, which is broader underneath. . . .• . In the 

 front leg the entire tarsus is about 4 times the length of the 

 tibia, in the middle leg 2.5 and in the hind leg 1.5 times. Wing 

 tinged with yellow along the costa and to a less degree all over 

 the apical half. "Shilo Cave, Ind. July." 



Male and female. Like the female as described above, but 

 dorsum with 3 subconfluent brownish stripes. Foremetatarsus 

 nearly 1.5 the tibia in length. The longer appendages of tl:2 

 hypopygium broad, with a preapical angle (Fig. 32). Wia^' 

 (Fig. 160). Ithaca, N. Y. 



3. Bxechia nugax n. sp. 



Male. Length 5 mm. Pleura light brown, mesonotum a 

 little darker, thoracic setae dark brown,, humeri yellow. Abdo- 

 men brown, on each side of segments 2 and 3 each with narrow 

 yellow triangle whose "base rests upon the posterior margin of 

 the segment; hypopygium yellow (Fig. 33). Wings hyaline, 

 tinged with brown in the costal cell and in the forks of media 

 and cubitus (Fig. 161). Fore metatarsus about 1.25 longer 

 than the tibia. Rouville Co. Que. ! Oct., Ithaca, N. Y. April. 



4. Bxechia nexa. n. sp. 



Male. Length 5 mm. Thorax reddish brown ; abdomen 

 brown, darker brown posteriorly, hind margins of segments 2-5 

 faintly dusky yellow; hypopygium yellow (Fig. 34). Fore- 

 metatarsus and tibia subequal in length. Wings hyaline, tinged 

 with brown (Fig. 162). Ithaca, N. Y. 



5. Bxechia abrupta n. sp. 

 Male. Length 4 mm. Thoracic setee black ; abdomen yellow, 

 each segment with large, brown, dorsal triangle widest part on 

 the anterior margin, on all segments, except i and 2, the ante 

 rior angles meeting on the venter, apex not reaching the pos- 

 terior margin except on 5, 6 wholly brown; hypopygium yellow 



