PHILIP P. CALVERT. /O 



40. liibelliila Doniitia Drury. P. 853. [Perithemis.] 



In Nordamerika und Westindien ; in Sommer's Sammlungr. 



Two males uuder the green drawer- label " Doiiiitia Drur. St. Cruz 

 Smr." in B.'s hand, at Halle, no pin-labels, have on the front wings 

 two posttriangular rows afterwards increasing, although B. places 

 Domitia as the first species under a section " Gleich anfangs drei 

 Zellenreihen in deni Felde hinter deni Dreieck der Vorderfliigel." 

 One of these males has the internal triangle of the front wings two- 

 celled, the other male has it one celled in front wings; the latter 

 shows a clear, not yellowish, but ill-defined band on all the wings 

 between the triangle and the nodus. 



Hagen's copy of B. has * opposite this name, but tliere is no 

 specimen of Domitia from Sommer's collection in the M. C. Z., al- 

 though there is a Brazilian male from Winthem's there. 



I have discussed the question of specific characters ba.sed on neu- 

 ration in this genus in a paper soon to be published in the Proceed- 

 ings of the California Academy of Sciences. 



41. L.ibellula piilla B. P. 855. [Trithemis.] 



alls byalinis, in basi fusco-fulvis, tesselatis; corpore testaceo-cinereo, 

 frontis macula ocellorumqne tuberculo nyaneis. Long-. lOV". 



Aus Surinam, in Sommer's Sammlung-. Diese Art zeichnet sich noch 

 dadurch aus, dass nur in den 2 ersten Querreihen hinter dem Flii- 

 geldreieck 3 Zellen lieg-en, m den 4 folg-enden aber 2. 



One male (T) below the green drawer-label " pulla*Surin. Smr." 

 in B.'s hand, at Halle; no pin-label. 

 A description follows : 



% (type). Vertex bifid, metallic blue, as also the frons except for a small 

 yellow spot on either side. Eyes in contact for a distance less than the antero- 

 posterior dimension of the occiput, which is brown above, yellow behind. Clypeus 

 olive, lips yellow, labrum with a median basal brown spot. Rear of the eyes 

 yellow, witli a lacerated blackish band on the inner (median) margin. 



Hind lobe of the prothorax yellow, subrectangular, with angles rounded, not 

 as wide as the middle lobe, with a median impressed Hue. 



Thorax yellowish with ditfuse brown markings on dorsum, perhayis etfects of 

 desiccation, and interrupted brown stripes on humeral, (obliterated) first lateral, 

 and second lateral sutures, on raesepimeron and on metepimeron, uuitiug with 

 each other at the bases of the feet. 



Feet dark brown, coxas, trochanters and inferior surfaces of femora paler. 

 Third tibia; with 11 anterior (external), 14 posterior (internal) slender spines. 



Abdomen tapering very slightly from 2 to 10, yellowish ; all carinse and su- 

 tures, the greater part of 4-7 (leaving only a basal yellovN' spot on either side of 

 dorsum) and 8-9 entirely, blackish-brown ; 10 and the ajjpendages luteous. Supe- 

 rior appendages as long as 9, with an inferior, angular dilatation at two-thirds 



TKANS. AM. ENT. SOC. XXV. SEPTEMBER. 1898. 



