41^6 COXXECTICUT GEOL. AXD NAT. HIST. SURVEY [Bull. 



20. Terminal three segments of antennae suddenly smaller than those pre- 

 ceding; body-coloration dull gray or huffy (Fig. 50. A) Trimicra 



Antennal segments gradually decreasing in size toward end : coloration of 



local species coal-black, variegated with yellow (Fig. 50, F) 



Erioptera (part) 



1. Subtribe Claduraria 

 Cladura Osten Sacken 



isf)!). (ladura Osten Sac-ken; l*roc. Acad. Xat. Sci. Phihidelphia. 

 1859 : ±>S). 



A small aeniis of flies, mo.st numerous in species in ,Ta[)an. The 

 adults are on the wing in late summer and autumn. The eai-ly stages 

 occur in relatively dry soil in mesophytic woodlands. 



Key fn Species 



1. Larger (w., 7 mm. or more); reddisli yellow, the thoracic pleura sparse!} 

 variegated with brown spots ; wings yellowish, the crossveins and deflec- 

 tions of veins clouded with brown ; Sc long, i'd ending beyond fork of 

 R-2+J+1, Sc-j opposite this fork; R2 much shorter than R-2+3. usually one- 

 fourth to one-fifth this length ; petiole of cell Mi short, not greatly ex- 

 ceeding );/ (Fig. 47, A) ; male hypopygium with a single dististyle. (Sub- 

 genus Cladura) ' ". flavoferrugi.iea 



Smaller (w., 6 mm. or less) ; very pale yellov,- or wliitish yellow, without 

 spots on pleura ; wings hyaline, without conspicuous darkened areas on 

 the crossveins ; Sc relatively short. Sci ending opposite two-thirds the 

 length of -Rj+n+4, Scj nearly opposite or shortly beyond the fork of Rs ; R^ 

 only a little shorter than /?2+:i; petiole of cell I\Ii long, about two or three 

 times ;<•/ ; male hvpopvgium with two dististyles. (Subgenus Xeocladura 

 Alexander) ." " delicatula 



Cladura (A^ocJadura) delicatula Alex. 



1S>14. Cladi/ra deUcatida Alexander: Proc. Acad. Nat. Sci. Philadel- 

 phia, 1914:589-590. 



Fig.— Alexander, Ibid., pi. fig. 27 (wing); 1914. 



(xeneral coloration pale yellow, the mesonotal praescutum darker 

 medially. Abdomen narrowly margined laterally with dark brown. 

 $. L. 4.5-5 mm.; \\. 5.6-6 nun. 9. L. 4.5-4.8 mm.: w. 5.5-5.7 mm. 



(Sept.) Me., N. H., Vt., Mass., N. Y., westw. to Ind. and Midi., southw. to S. C. 

 and Tenn. 



C. (rZf/*f?//y/) flavoferruginea O. S. (Fig. 47. A). 



1859. Cladura flacoferriK/inea Osten Sacken; Proc. Acad. Xat. Sci. 



Philadeli)hia, 1859 : '229. 

 1861. C. riidirisa O.sten Sacken: Hid.. Is61 : -291. 



Figs. — Osten Sacken, Proc. Acad. Nat. Sci. Philadelphia, pi. 4, fig. 34: 1859. 

 Osten Sacken, Mon. Dipt. N. Amer., 4:34 (ven.), pi. 4, fig. 22 (hyp.) ; 1869. Need- 

 ham, 23rd Rept. N. Y. St. Ent. for 1907. pi. 22, fig. 2 (ven.) ; 1908. Alexander and 

 Leonard, Journ. N. Y. Ent. Soc, 20:36-39, pi. 4 (abnormal ven.) ; 1912. Alexander. 

 Cfls. N. Y., 1, pi. 37, fig. 102 (wing) ; 1919. Crampton, Insec. Inscit. Menst.. 13, 

 pi. 3, figs. 19, 22 (thorax) ; 1925. Dickinson, Cfls. Wise, p. 198, fig. 87 (wing) ; 

 1932. 



