620 PROCEEDINGS OF THE NATIONAL MUSEUIVI vol. in 



their native haunts; the other seven were found in a specialized form 

 of collecting in which the orchids were examined after having been 

 shipped from their country of origin. Collecting on Cattleya in Central 

 and South America should yield many more specimens. 



Dallasiellus (Dallasiellus) ovalis, new species 



Diagnosis. — Among the smaller species (not over 5.5) with the 

 three widely separated setigerous punctures in fiont of the eye, this 

 species may be recognized by the lack of costal setigerous punctures 

 and the obsolete transverse pronotal impression. 



Description. — Based on three females. Oval. 



Head: Length two-thirds width, 0.80(0.70-0.83) : 1.24(1.23-1.26); 

 interocular width, 0.78(0.76-0.81); anterior outline a flattened semi- 

 circle, clypeus as long as juga, narrowed apically; surface shining, 

 impunctate, with three widely-separated submarginal setigerous 

 punctures; ocelli small, separated from eye by space more than three 

 times transverse ocellar width; jugum ventrally and maxillary plate, 

 except basal third, polished, impunctate. Antennal segments: 

 I, 0.20(0.20-0.20); II, 0.20(0.20-0.20); III, 0.29(0.26-0.33); IV, 

 0.36(0.36-0.36); V, 0.47(0.47-0.48). Bucculae almost as high as 

 labial II; labium reaching between middle coxae. Labial segments: 

 I, 0.43(0.40-0.45); II, 0.70(0.70-0.72); III, 0.54(0.50-0.60); IV, 

 0.32(0.30-0.33). 



Pronotum: Length more than half width, 1.36(1.36-1.38) : 2.47 

 (2.44-2.53); anterior margin shallowly, singly emarginate; side 

 margins entire, straight on basal two-thirds, with four or five sub- 

 marginal setigerous punctures; transverse impression postmedian, 

 obsolete, marked by very irregular row of numerous punctures; both 

 lobes laterally with numerous punctures; anterior lobe with curved 

 row of punctures paralleling anterior emargination ; posterior lobe 

 with distinct punctures scattered across most of disc. 



Scutcllum: Longer than wide,l. 73(1. 12-1. 90): 1.51 (1.49-1.56); disc 

 polished, with a number of well-separated moderate punctures 

 becoming finer apically. 



Hemelytron: Clavus and corium polished; clavus with two longi- 

 tudinal rows of punctures; mesocorium coarsely punctured toward 

 base, more finely and sparsely so toward apex, with two complete 

 rows of punctures paralleling claval suture; exocorium with punctures 

 crowded for full length; costa with no setigerous punctures; mem- 

 branal suture straight, lateral angle faintly prolonged; membrane 

 longer than basal width, slightly surpassing apex of abdomen. 



Propleuron: Shining, punctate only in depression; prosternal 

 carinae less than half as high as labial II. 



Mesopleuron: Lateral area impunctate, lightly obliquely rugose. 



