CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 519 



Mesopleuron: Evaporatorium interrupted posteriorly by shining 

 submarginal band, lateral area impunctate. 



Metapleuron: Lateral margin of evaporatorium distinctly concave; 

 lateral area impunctate. 



Legs: Posterior tibia not expanded near apex. 



Terminalia: Genital capsule strongly punctate laterally, apical 

 margin with broad, shallow emargination mediall}^; gonostylus as 

 illustrated (fig. 240). 



Length of body: 11.91(10.80-13.39). 



Female: Similar to male, but lacking median, subapical depression 

 on anterior lobe of pronotum and often with pronotal punctation 

 less dense; measurements averaging larger. 



Head: Length-width ratio, 1.84(1.69-1.95) :3. 13(2.93-3.26) ; inter- 

 ocular width, 1.71(1.62-1.82). Antenna! segments: I, 0.67(0.60- 

 0.73); II, 0.49(0.40-0.53); III, 0.89(0.76-0.96); IV, 0.93(0.80-1.00); 

 V, 1.04(0.96-1.10). Labial segments: I, 1.01(0.93-1.13); II, 1.60 

 (1.33-1.72); III, 1.62(1.43-1.69); IV, 1.11(1.00-1.23). 



Pronotum: Length-width ratio, 4.02(3.57-4.29) :6.91(6.28-7.28). 



Scutellum: Length-width ratio, 4.28(3.71-4.71) :4. 55(4. 14-4.85). 



Length of body: 12.96(11.25-13.95). 



Type data. — Although no locality was specifically cited in the 

 original description, the title of StM's paper indicated the material 

 had come from Mexico. The type has not been located. It is not 

 with the StM collection (Stock) . 



Specimens studied. — 14 males, 30 females. 



Mexico: Veracruz: Atoj-ac, C6rdoba, Jesus Carranza; May. 



Guatemala: Morales; August. 



British Honduras: Punta Gorda; July. 



Costa Rica: Cairo; April. 



French Guiana: Mara River (Oyapock River); May. 



Brazil: Chapada, Monlevade, Rio Madeira, Vigasa (Minas Gerais); May, 

 September. 



Peru: Tingo Maria; May. 



Aroentina: Coronda (Santa F6), Urundel (Salta); adults and nymphs, 

 January. 



Discussion. — In citing this species as the sole inclusion in his new 

 genus Syllobus, Signoret (1879) gave the original combination of this 

 name as "Cydnus emarginatus Stal." This was undoubtedly an 

 error as the insect was originally described as a member of the genus 

 Cyrtomenus . 



Except for an occasional notation of "collected at light," no eco- 

 logical data were found on any of the specimens. Fifth-instar 

 nymphs show the apical, bluntly triangular projections of the juga 

 characteristic of the adults. 



