NATURAL SCIENCES OP PHILADELPHIA. 291 



immaculate, slightly tinged with brownish ; stigmatical crossveins and the 

 other central crossveins with a slight brown nebula ; veins minutely pubescent 

 towards the tip ; the stigmatical crossvein starts from the upper branch of the 

 radial vein, immediately beyond the origin of the second radial area ; the latter 

 is a little shorter than the cubital area ; the subapical area almost of the same 

 length with the preceding one ; discoidal areolet narrowed anteriorly, like a 

 truncated triangle ; the great crossvein a little anterior to the discoidal areolet. 



Washington, D. C, autumn, 1860. 



Compared a ^ aQ d a 9 specimen ; the discoidal areolet of the right wing of 

 the $ is abnormally formed, its second lower discal crossvein being removed 

 towards the basis of the areolet, in such a way that the first and secoud exter- 

 nomedial veins form a petiolate areolet, and the discoidal areolet is very much 

 shortened. 



CLADURA 0. S. 



C. indivisa. Flavo-ferruginea ; pleura? punctis, abdomen fasciis brunneis ; 

 alae subflavescentes ; area cabitali Integra (veaula transversa non instructa) ; 

 long. 0-280-3. 



Similar in all respects to C. flavoferruginea, only the transverse vein in the 

 cubital area is wanting ; crossveins and origin of petiole but indistinctly 

 clouded ; the size is variable, but generally smaller than in the other species. 



When I described C. flavoferruginea, I had several specimens of this new 

 species before me, all from Massachusetts. Although the absence of the cross- 

 vein in all these specimens was a very striking character; I did not choose 

 at that time, without further proof, to consider them as a different species. 

 Since then I caught numerous specimens at the Trenton Falls, in September, 

 1860, all partaking of the same character, which removes all doubt as to their 

 specific diversity. Some of these specimens, probably recently excluded, were 

 very pale and altogether without spots. 



Mass. (Mr. Scudder) ; Trenton Falls (nob.) 



AMALOPIS Halid. 



A. vernalis. Fusco-cinerea, thorace vittis tribus fuscis, media cuneiformi, 

 capillari ; alae maculis 5 vel 6 in margine anteriore ; long. 0.3 0.4. 



Head brownish-cinereous, front infuscated in the middle, palpi at the tip ; 

 antenna? 16-jointed, not much longer than the head; basal joint yellowish, 

 flagellum brown, verticils very short. Prsescutum yellowish-cinereous with 

 three stripes ; the intermediate one broad, cuneiform, with a pale line in the 

 middle (capillary) ; lateral ones abbreviated anteriorly ; scutum infuscated in 

 the middle ; scutellum, metathorax and pleurae cinereous; the latter somewhat 

 hoary ; halteres pale yellowish ; feet brownish, base of femora pale. Abdomen 

 brown, posterior margin of the segments pale ; $ ovipositor ferruginous. 

 Wings somewhat infuscated with five brown spots along the anterior margin; 

 the first at the mediastinal crossvein, the second at the origin of the petiole, 

 the third, fourth and fifth at the tip of the mediastinal, subcostal and radial 

 veins; a sixth spot is at the tip of the petiole; besides these spots, all the 

 crossveins and tips of the longitudinal veins are more or less clouded ; the male 

 especially has some indistinct clouds on the apical portion of the wing, along 

 the veins : petiolate areolet extant. 



Washington, D. C, two specimens ( ^ 9) in April (nob.) 



This species shares all the characters of Amalopis ; the palpi, however, seem 

 to be somewhat shorter than in the other species of this genus. The structure 

 of the discoidal areolet is very peculiar ; the obliquity of the second lower dis- 

 cal crossvein, common to all species of the genus, is carried so far here, that 

 this crossvein assumes an altogether longitudinal direction, and thus ceases to 

 be a crossvein, becoming a mere prolongation of the second externomedial vein. 

 In consequence of this, the following changes take place in the neuration of 

 that part of the wing : the discal areolet is narrow, parallel, and has but a single 



1861.] 



