42 burmeister's odonata. 



agrees with De Selys' description, but cannot be Burnieister's t3'pe 

 as the pectus is mostly black ; Hagen's identification may, neverthe- 

 less, be correct, as De Selys states that in the younger individuals 

 the pectus is paler. The last four segments of this male are lost. 



Two males found by me standing under the yellow drawer-label 

 " pruinosuni d. Haan Java" in B.'s hand, at Halle, no pin-labels, are 

 specifically difi^erent from each other and from de Selys' description 

 of Pseudagrion pruinosum. Both agree with Burmeister's descrip- 

 tion. I could not identify them. 



One aftrees witli Pseud ay rion m venation, but lias tlie inferior ajipendagies dis- 

 tinctly longer than the superior appendages, although not as long as 10, and 

 similar in profile view to those of EnaUagma eiiile for example. Superior appen- 

 dages little more than half as long as the inferiors, in profile bifid at apex with a 

 thicker, superior branch and a slender, straight, longer, inferior branch, a])proxi- 

 uiately parallel, not divergent. Ehiuarium, lips, and rear of head luteous. No 

 apparent postocular spots. Vertex, prothorax and thoracic dorsum to second 

 lateral sutui'e blackish, little metallic reflection ; sides behind second lateral 

 suture and pectus yellow. Dorsum of 1-7 metallic-blue or green, of 10 black; 

 8 and 9 pale blue, 9 with a black band on either side of the dorsum only in the 

 ai)ical half, uniting at apex with fellow of opposite side. Ventral surface of 1-10 

 yellowish. Pterostigma luteous, darker in the middle, surmounting slightly less 

 than one cell ; 14 postnodals. Abd. 31. Hind wing 23. 



The other male has the last four abdominal segments wanting; a Platycnemine 

 (legion) wing has been wrongly added, the other three are genuine. It belongs 

 to the legion Agrion, has the inferior sector of the triangle rising far in front of 

 the submedian cross-vein, which is placed between first and second antenodals. 

 Wings petiolated not quite as far as level of first antenodal. Upper side of quad- 

 rilateral one-fourth as long as the lower side on the front wings, slightly less than 

 one-half as long as the lower side on the hind wings ; 11 postnodals. Pterostigma 

 luteous, surmounting one cell. Vertex and rear of head black, no postocular 

 spots. Rhinarium, lips yellow. Thoracic dorsum dark metallic purple to first 

 lateral suture. Sides and pectus yellow, a complete black line on second lateral 

 suture. Dorsum of 1-6 dark metallic blue, with an interrupted, narrow, basal, 

 yellow ring on 3-6. Inferior abdominal surface obscure yellowish. Total length 

 of head, thorax and firet six abdominal segments 24 mm., hind wing 18 mm. 



20. Agrion caflrum B. P. 821. [Pseudagrion.] 



nigro-seneum, ore fronte infra pectore abdominisque ventre rubro- 

 pallidis ; alarum stigmate fusco ; mesonoti vltta lateral! pallida. 

 Long-. 1" 4'". 



Vom Port natal und St. Johanna, einer der Comorischen Inseln, 2 

 Mannchen, das eine aus der Dreg-eschen Sammlung-, das andere von 

 Hrn. Sommer. 



Three males stand under the blue (b-awer-label " caft'rum * Afr. 

 austr." in B.'s hand, at HalJe ; two with bits of unmarked blue paper 

 on their pins, the other without any pin-label. The three are all 



