NATURAL SCIENCES OP PHILADELPHIA. 229 



Cladura nob. 



Proboscis and palpi short ; last joint of the latter very stout. Front and 

 vertex convex. Eyes almost contiguous on the under side of the head. Antenna 

 16-jointed, of moderate length (reaching the base of the wings) ; first joint 

 cylindrical, second turbinated, the following joints subcylindrical, elongated, 

 slightly incrassated at the base, with moderate verticils. Feet long, moderately 

 stout, tibiae without spurs at the tip. Ungues small, smooth. Pulvilli distinct. 

 Wings long, neuration like Limnophila, with two radial arese and one 

 petiolate areolet. Veins with a short, hut distinct, pubescence on the apical 

 portion of the wing. Genitals of the tf large, stouter than the abdomen; the 

 upper side of the last abdominal segment is horny, convex, having a notch be- 

 tween two projecting points on the posterior margin; the forceps, which are 

 inserted below, are large, with a long, cylindrical basal joint. (See fig. 34 ; this 

 sketch is drawn from a dry specimen, and might not perhaps be altogether cor- , 

 rect ) Ovipositor of the 9 of the usual structure; the upper valves are flattened, 

 lamelliform towards the tip. 



In general appearance this genus is very like Limnophila, but it may be 

 distinguished at once by the absence of spurs on the tibice. It has this character, 

 as well as the slight pubescence on the veins of the wing, in common with 

 Erioptera; but its long feet and elongated wings give Cladura an alto- 

 gether different appearance. By its eyes, contiguous below, it reminds of S y m- 

 ple eta . In the structure of the tf genitals it differs from all other genera of 

 the group. 



C. flavoferruginea. Flavo-ferruginea, praescuto nitido ; pleurse punc- 

 tis, abdomen fasciis brunneis ; alae flavescentes, venulis transversalibus infus- 

 catis ; long. lin. 3 3. 



Proboscis, palpi and antenna? pale ferrugineous ; the two latter infuscated at 

 the tip. Praescutum ferruginous, shining; a more or less apparent dark line 

 in the middle ; a browa spot on the humerus ; pleurae pale yellow ; two brown 

 spots between the humerus and the base of the wing ; a third one lower, about 

 the middle of the pleurae; scutellum and metathorax ferruginous; a small 

 black dot on each side, between the latter and the base of halteres ; these are 

 pale ; feet hairy, yellowish ferruginous; tips of femora, tibia? and tarsi brown. 

 Tergum ferruginous ; lateral margins of segments brown, united by a pale brown 

 band running across the middle of each segment; venter yellow; genitals fer- 

 ruginous, shining. Wings yellowish ; costal, subcostal and pobrachial veins 

 ferruginous ; other veins brown ; cross-veins and origin of petiole clouded with 

 brown ; stigma pale ; a supplementary cross-vein about the middle of the cubital 

 area. 



Washington, D. C. October, November, (nob.) 



Compared seven tf and 9 specimens. 



In one of my specimens, there is a second supplementary cross-vein in the 

 second radial area on one wing, and in the subapical on the other. 



Besides the seven specimens described above, I have three from Massachusetts 

 (sent by Mr. Scudder), distinguished from the above described specimens by the 

 absence of the supplementary cross-vein in the cubital area. These three speci- 

 mens are smaller in size, and the cross-veins of the wing are scarcely clouded. 

 I doubt whether they belong to a different species, but still it is very remarka- 

 ble that all came from the same locality. In the mean time I have abstained on 

 their account from mentioning that supplementary cross-vein among the char- 

 acters of the genus as well as in the diagnosis of the species. 



Gonomyia Meig. 



Proboscis and palpi short; the joints of the latter nearly equal length. An- 

 tennae 16-jointed, of moderate length (not reaching the base of the wing.) Feet 

 long, slender ; tibia; without spurs at tip; ungues small; pulvilli distinct. Wings 



1859.] 



