512 
Psyche 
[September-December 
Aphelocheirus aestivalis Fabricius (preserved in Bourn’s fluid; 
collected in England by D. T. Crisp; two specimens) 
The specimens were first dissected in 80% alcohol under a stereo- 
scopic microscope. They were cut midsagittally with a razor blade 
and the ventral and dorsal surfaces of one or both halves were sep- 
arated along the lateral edge. On one specimen of Aphelocheirus a 
small section of the metathoracic episternum was removed so that the 
cut edge could be examined. A major obstacle was the presence of 
large amounts of silt and other debris on the external surfaces of 
all three species. Treatment with weak solutions of either potassium 
hydroxide or Sparkleen detergent failed to remove it. Somewhat 
better results were obtained by scraping small areas with watch- 
maker’s forceps. 
The specimens were then mounted with double-sided tape on 
aluminum stubs, freeze-dried, and coated, in an Edwards vacuum 
evaporator, Model 4, with a layer of gold which was approximately 
200-400 A thick. They were examined in a Cambridge Stereoscan, 
Model 2A, and photographed with a Singer camera, using Ilford 
120 roll film. 
Observations 
Ventral Surface 
( 1 ) Plastral Hairs 
In both species of Cryphocricos most of the ventral surface is 
covered with densely-packed hairs (Fig. 3). They occur on the pro- 
Fig. 1. Cryphocricos barozzii; ventral view, legs removed. Stippling 
on fourth through sixth abdominal sternites indicates area of microtrichia 
(Fig. 11) ; stippling on ventral abdominal paratergites, left side of figure, 
indicates area of short leaf-like setae (Figs. 6-8). Longer leaf-like setae 
occur on the six pairs of abdominal sense organs. Most of the Ventral 
surface is covered with plastral hairs (Figs. 3, 4). 
Abbreviations: EM, epimeron ; ES, episternum; FW, forewing; LS, 
longitudinal sulcus; MCI, metacoxal indentation on abdomen; PT, ventral 
abdominal paratergite; SO, abdominal sense organ; SP, abdominal spiracle; 
ST, sternite. Arabic numerals indicate abdominal segments; Roman nu- 
merals indicate thoracic segments. 
Fig. 2. Cryphocricos barozzii; dorsal view, right forewing removed, 
revealing smooth subalar surfaces on right side (even stippling). Other 
surfaces are roughened. For distribution of plastral hairs, see text. 
Abbreviations: TI, TII, Till, thoracic terga ; Tl, T2, T3, abdominal 
terga. 
