380 CONNECTICTT GEOL. AND NAT. HIST. SURVEY [Bllll. 



LhnnophUa hitennhiafa Walk. ; Insecta Saimdersiana, 1, Dipt., 

 p. 43C): 1856. Dr. Fred W. Ed^vards sends me the following notes on 

 Walker's type. 



Type "lacking abdomen and all legs except one mid-femur and 

 tibia. Head (crushed) dull broAvnish; appendages brown; antennae 

 short. Thorax uniformly shining reddish-brown; scutellum lighter. 

 Mid-femur scarcely darkened at tip; mid-tibial spurs black, as long 

 as tibial diameter. Venation much as in poetica^ but Rs not quite so 

 long and less distinctly spurred; ^2 + 3+4 not quite so short; m-cu at 

 midlength of cell 1st M-z- Tinj^ brown dots at base and tip of Rs^ over 

 Sc^ fork of ^2+3+4. over R2 and at tip of ^3. Anal area larger than 

 shown for foet'ica (Cfls. N. Y., 1). Walker gives the length as 12 

 mm. ; wing about 10 mm. 



Limmophila igriohilis Walk.; Insecta Saundersiana, 1, Dipt., p. 

 437; 1850. Dr. Edwards states that the type is lost. Certain features 

 of the original description are suggestive of Hexatoma {Eriocera). 



Subgenus Lasiomastix O. S. 



1859. L'tDuiophila {LasiomastAx) Osten Sacken; Proc. Acad. Nat. 

 Sci. Philadelphia, 1859 : 233. 



The essential characters of the present group lie in the presence 

 of macrotrichia in the outer cells of the Aving (Fig. 43, J, K) cor- 

 related with venational characters, such as the very short petiole of 

 cell i?3, and the elongate antennae of the male sex. The immature 

 stages are spent in mud or rich organic earth. 



Key to Species 



1. General coloration of mesonotum polished black; wings subhyaline, with a 



heavy brown pattern that is more or less cross-banded ; antennae { $) very 

 elongate, approximately as long as the body, the cylindrical segments pro- 

 vided over their entire length with long erect setae that greatly exceed t!ic 



short, subappressed verticils (Fig. 43, J) macrocera 



General coloration dull gray ; wings grayish subhyaline, unmarked, except for 

 the stigma; antennae {$) elongate, approximately one-half the length of 

 body, the segments with short verticils at near midlength, these longer than 

 the short dense pubescence ... 2 



2. Cell Ml lacking (Fig. 43, K) subtenuicornis 



Cell Ml present tenuicornis 



Limnophila (Lasiomastix) macrocera (Say) (Fig. 43, J). 



1823. Limnohm viacrocera Sav; Journ. Acad. Nat. Sci. Pliiladelphia, 



3 : 20. 

 1869. Limnophila macrocera Osten Sacken; Mon. Dipt. N. Amer.. 4: 



204-205. 



Figs.— Alexander, Cfls. N. Y., 1, pi. 38, fig. 113 (wing); 1919. Crampton, Ann. 

 Ent. Soc. Amer., 18, pi. 3, fig. 5 (thorax) ; 1925. Crampton, Trans. Amer. Ent. 

 Soc, 52, pi. 14, fig. 60 (neck, prothorax) ; 1926. 



Thoracic pleura pruinose. Antennae of female much shorter than 

 in male, if bent backward extending about to wing-root, without erect 

 setae; maxillary palpi elongate, exceeding the head. Wings whitish 

 subhyaline. incompletely cross-banded with dark brown, including 



