NO. 2242. MORPHOLOGY OF THE STREPSIPTERA— PIERCE. 403 



NEOCHOLAX JACOBSONI Meijere. 



A male of this species was collected at night in Java (Terry, 1912). 

 The host of this species is Ossoides lineatus Bierman a Tropiduchid 

 (Meijere, 1911). 



CYRTOCARAXENOS JAVANENSIS Pierce. 



A male was collected at light, August, 1908, at Buitenzorg, West 

 Java, by ¥. W. Terry. 



BIOLOGICAL NOTES. 

 STYLOPS MELITTAE Kirby. 



Smith and Hamm (1914) write that: 



At the end of Api'il and beginning of May, 1912, tlie male Stylops was not 

 uncommon in the vicinity of tlie colony of Andrena nigrocciiea, being seen on the 

 wing at midday in sunshiny Weather. 



This observation was made near Oxford, England : 



None were observed actually flying over the burrows of the bee and nearly all 

 then first seen were some 10 or 15 feet from the ground. 



When placed in boxes with bees containing females: 



The male Stylops, directly it was introduced into the box, fluttered on to the 

 bee and quickly ran over its body to where the head of the female Stylops was 

 everted between the bee's abdominal segments. At this time the male is rapidly 

 vibrating its wings and protruding its last two or three apical segments, which 

 are long and tapering like an ovipositor. 



Actual pairing did not occur on any of the three occasions. 



After about 10 or 15 minutes of ceaseless running to and fro over the bee, 

 the male Stylops voluntarily quitted the Andrena, but still continued to run 

 and vibrate its wings for about two hours longer, after which time it dropped 

 apparently exhausted and died shortly afterwards. 



DACYRTOCARA UNDATA Pierce. 



Two females extracted from a female Oncometopia undata Fabri- 

 cius collected in May, 1915, at Thomasville, Georgia, had the body 

 filled with eggs in an early stage of development. These females 

 were each 7 mm. long. 



MORPHOLOGY AND ANATOMY. 



INTERNAL STKUCTXJRE. 



An important article on the metamorphosis of some of the ana- 

 tomical structures of Xenos rossii, taken at Freiburg in Polistes 

 gallica., has been contributed by Paul Rosch (1913). This work is 

 in reality supplementary to Nassonow's excellent treatises. The 

 principle features of this discussion are the development of the eyes, 



