I 10 SAMUEL II. SCUDDER OX 



the wing shows the upper surface and is arched transversely, the costal area roof-like, 

 the veins running in slight furrows. It is peculiar for having, like JR. Stricklandi, a very 

 straighl and uniform costal area, but the depressed humeral field is of the usual width, 

 though rather short, the costal veins are numerous and crowded, and a supplementary 

 inferior, forked, apical vein carries the area quite to the tip of the wing; the latter char- 

 acteristic may well be individual. The extemomedian and internomedian veins divide 

 their space between them very equally with abundant, forked, almost perfectly straight 

 veins, the internomedian area terminating just before the apical curve of the wing, and 

 the extemomedian first forking far before the middle of the wing. The anal furrow is 

 no more depressed than the other veins, strongly arcuate in its basal half, straight be- 

 yond, with a slight outward curvature at the tip, which is opposite the first forking of the 

 extemomedian vein. The course of the main extemomedian vein is almost exactly down 

 the middle of the wing, and the nervules on either side of the wing are about equally 

 crowded. 



Length of wing, 6.5 mm. ; breadth, 2.2 mm. The species is named for Mr. Herbert 

 Gross, who has done so much in recent years to foster in England an interest in fossil 

 insects. It comes from the English Purbecks and was submitted to me lor study by 

 the Rev. P. B. Brodie. 



Rithma disjuncta sp. nov. 



PI. 46, tig. 14. 



A single wing in which the characteristics of the neuration are well shown, although 

 only fragments of the border appear. It is possible nevertheless to judge with probable 

 accuracy of the form of the wing, which seems to have been pretty regularly obovate and 

 a little more than two and one-half times longer than broad. The wing is perfectly flat 

 on the dirty brown stone, with black veins and more or less broken black intercalary 

 veins, especially in the costal area. The humeral held must have been very slight; the 

 mediastino-scapular vein pretty strongly sinuous in the basal half, nearly straight api- 

 cally, the costal area occupying in the middle nearly half the wing, terminating just above 

 the apex, and being filled, including the intercalaries, with numerous, crowded, oblique, 

 simple veins. The extemomedian vein follows the same sinuous course, is forked not far 

 before the middle of the wing, the lower branch again forked at less than half-way to the 

 margin; probably all fork again beyond, but the specimen is broken here. The inter- 

 nomedian reaches just about as far out as in H. Goss/'i, is doubly arcuate, and has three 

 or four inferior, straight, parallel, oblique branches. The nervules of the-inner are not 

 nearly so crowded as those of the costal margin. The anal furrow is not depressed, 

 strongly arcuate at base, straight and oblique beyond, reaching the margin opposite the 

 first forking of the extemomedian vein. 



Probable length of wing, 5.3 mm. ; breadth, 2 nun. The species is the smallest of the 

 genus, conies from the Wiltshire Purbecks, and is in the collection of the Rev. P. B. 

 Brodie. 



