PROC. ENT. SOC. WASH., VOL. 20, NO. 9, DEC., 1918 195 



EXPLANATION OF PLATE 10 



Published by courtesy af Entomological News and the Author, 



Mr. Daecke. Original publication, Ent. News, April, 



'07, Vol. XVIII pp. 139-146. 



WING PICTURES OF CHRYSOPS. 



1, excitans 13, univittatus 25, dimmocki 



2, celer 14, bistellatus 26, montanus 



3, carbonarius 15, Indus 27, sackeni 



4, mitis 16, vittatus 28, frigidus 



5, cuclux 17, striatus 29, pudicus 



6, niger 18, sequax 30, cursim 



7, brimleyi 19, lugens 31, fulvistigma 



8, amazon 20, parvulus 32, brunneus 



9, nigribimbo 21, hinei 33a, flavidus 



10, plangens 22, obsoletus 33b, flavidus 



11, fallax 23, delicatulus 33c, flavidus 



12, moechus 24, callidus 



CC. Apex of wing beyond crossband entirely hyaline. 



H. Second basal cell entirely hyaline niger 



HH. Second basal cell infuscated for at least half its length. 



I. Abdomen with grayish yellow spots at sides of seg- 



ments 1-2; wing markings light brown cuclux 



II. Abdomen and wings not so marked. 



J. Fifth posterior cell with a small circular hyaline 



spot at base carbonarius 



JJ. Fifth posterior cell without such spot. 



K. Thorax with conspicuous lateral tufts of 



orange pile celer 



KK. Thorax without such tufts mitis 



BB. Wing entirely hyaline vitripennis 



AA. Abdomen mostly yellowish, with dark markings. 



L. Body markings strongly contrasting, wing picture pronounced. 

 M. Dark markings on second segment distinctly convergent 

 or united, thus becoming inverted u-shaped, those on 

 third to last segments tending to be transverse and usu- 

 ally enclosing a median series of more or less triangular 

 areas. 

 X. First basal cell in large part hyaline. 



O. Infuscation of wing beyond crossband confined to a 

 narrow band along costal margin; abdominal 

 triangles large callidus 



