490 

 4- Tanytarsus flavellus Zetterstedt 



Chironomus flavellus Zetterstedt, Ins. Lappon., 1838, p. 816, sp. 41. 



Johannsen records this European species from Ithaca, N. Y. I 

 have some doubt as to the identity of the American specimens with the 

 species recorded from Europe, but in the absence of examples of the 

 latter accept the published record as authentic. The individuals which 

 I have here referred to the species recorded from New York differ 

 from the foregoing description of ncoflavcUus in being smaller, 1.75 

 mm., and in having the second joint of the fore tarsi nearly one half 

 longer than the fore tibiae, the lengths of the tibi?e and the first and 

 second tarsal joints being respectively as 10, 27, 14. 



The localities of my specimens are Lafayette, Ind., June 5 (J. M. 

 Aldrich), and South Haven, Mich., July 15,1914 (C. A. Hart). 



The species almost certainly occurs in Illinois. 



Early stages undescribed. 



5. Tanytarsus confusus, n. sp. 



This species differs from the foregoing in being considerably 

 larger, 2.5-3.5 iTirn-> and in having the proportions of the fore tibiae 

 and first and second tarsal joints different: male, 18, 53, 24; female, 

 12, 31, 15. The hypopygium is similar to that of dives, differing in 

 the shape of the extension of the dorsal plate, and noticeably ii"i the 

 form of the superior process (PI. XXXVI, Fig. 5). In many respects 

 confiisiis resembles ncoflavcUus, but the proportions of the fore tibiae 

 and fore tarsi are cjuite different in the two species. 



Type locality, Urbana, 111., May and October, 19 14. Paratypes 

 from Havana, April, Muncie, Mav, and Momence, July, all in Illinois 

 (C. A. Hart and J. R. Malloch) ; and from Washington, D. C. (W. L. 

 McAtee). 



6. Tanytarsus pusio Meigen 



CMronomus pusio Meigen, Syst. Beschr. Eur. Zweifl. Ins., Vol. 6, 1830, p. 2.56, 

 sp. 117. 



Male. — Green. Head yellowish green ; scape of antennse and flagel- 

 lum, except its extreme base, fuscous, plumes pale brown. Thoracic 

 vitta;, the lower half of pleurse, and greater portion of the postnotum 

 blackish brown. Abdomen whitish green, apically yellowish. Legs 

 white. Wings clear, veins colorless. 



Antennae 1.5 as long as head and thorax together. Pronotum lin- 

 ear ; mesonotum produced anteriorly. Hypopygium similar to that of 

 C. fusciventris (PI. XXXVI, Fig. i) except that the apical portion of 

 lateral arm tapers very decidedly apically and that the superior process 



